diff --git a/.coveragerc b/.coveragerc
index cb5299beaad..de93cac55b5 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -714,6 +714,7 @@ omit =
     homeassistant/components/tikteck/light.py
     homeassistant/components/tile/device_tracker.py
     homeassistant/components/time_date/sensor.py
+    homeassistant/components/tmb/sensor.py
     homeassistant/components/todoist/calendar.py
     homeassistant/components/todoist/const.py
     homeassistant/components/tof/sensor.py
diff --git a/CODEOWNERS b/CODEOWNERS
index 93b41c6d38c..69ed17cbdf2 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -337,6 +337,7 @@ homeassistant/components/threshold/* @fabaff
 homeassistant/components/tibber/* @danielhiversen
 homeassistant/components/tile/* @bachya
 homeassistant/components/time_date/* @fabaff
+homeassistant/components/tmb/* @alemuro
 homeassistant/components/todoist/* @boralyl
 homeassistant/components/toon/* @frenck
 homeassistant/components/tplink/* @rytilahti
diff --git a/homeassistant/components/tmb/__init__.py b/homeassistant/components/tmb/__init__.py
new file mode 100644
index 00000000000..5a0f5aa54fb
--- /dev/null
+++ b/homeassistant/components/tmb/__init__.py
@@ -0,0 +1 @@
+"""Support for Transports Metropolitans de Barcelona."""
diff --git a/homeassistant/components/tmb/manifest.json b/homeassistant/components/tmb/manifest.json
new file mode 100644
index 00000000000..bb76b3193fc
--- /dev/null
+++ b/homeassistant/components/tmb/manifest.json
@@ -0,0 +1,12 @@
+{
+  "domain": "tmb",
+  "name": "Transports Metropolitans de Barcelona",
+  "documentation": "https://www.home-assistant.io/integrations/tmb",
+  "requirements": [
+    "tmb==0.0.4"
+  ],
+  "dependencies": [],
+  "codeowners": [
+    "@alemuro"
+  ]
+}
\ No newline at end of file
diff --git a/homeassistant/components/tmb/sensor.py b/homeassistant/components/tmb/sensor.py
new file mode 100644
index 00000000000..6d8bdc7eac7
--- /dev/null
+++ b/homeassistant/components/tmb/sensor.py
@@ -0,0 +1,120 @@
+"""Support for TMB (Transports Metropolitans de Barcelona) Barcelona public transport."""
+from datetime import timedelta
+import logging
+
+from requests import HTTPError
+from tmb import IBus
+import voluptuous as vol
+
+from homeassistant.components.sensor import PLATFORM_SCHEMA
+from homeassistant.const import ATTR_ATTRIBUTION, CONF_NAME
+import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity import Entity
+from homeassistant.util import Throttle
+
+_LOGGER = logging.getLogger(__name__)
+
+ATTRIBUTION = "Data provided by Transport Metropolitans de Barcelona"
+
+ICON = "mdi:bus-clock"
+
+CONF_APP_ID = "app_id"
+CONF_APP_KEY = "app_key"
+CONF_LINE = "line"
+CONF_BUS_STOP = "stop"
+CONF_BUS_STOPS = "stops"
+ATTR_BUS_STOP = "stop"
+ATTR_LINE = "line"
+
+MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=60)
+
+LINE_STOP_SCHEMA = vol.Schema(
+    {
+        vol.Required(CONF_BUS_STOP): cv.string,
+        vol.Required(CONF_LINE): cv.string,
+        vol.Optional(CONF_NAME): cv.string,
+    }
+)
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
+    {
+        vol.Required(CONF_APP_ID): cv.string,
+        vol.Required(CONF_APP_KEY): cv.string,
+        vol.Required(CONF_BUS_STOPS): vol.All(cv.ensure_list, [LINE_STOP_SCHEMA]),
+    }
+)
+
+
+def setup_platform(hass, config, add_entities, discovery_info=None):
+    """Set up the sensors."""
+    ibus_client = IBus(config[CONF_APP_ID], config[CONF_APP_KEY])
+
+    sensors = []
+
+    for line_stop in config.get(CONF_BUS_STOPS):
+        line = line_stop[CONF_LINE]
+        stop = line_stop[CONF_BUS_STOP]
+        if line_stop.get(CONF_NAME):
+            name = f"{line} - {line_stop[CONF_NAME]} ({stop})"
+        else:
+            name = f"{line} - {stop}"
+        sensors.append(TMBSensor(ibus_client, stop, line, name))
+
+    add_entities(sensors, True)
+
+
+class TMBSensor(Entity):
+    """Implementation of a TMB line/stop Sensor."""
+
+    def __init__(self, ibus_client, stop, line, name):
+        """Initialize the sensor."""
+        self._ibus_client = ibus_client
+        self._stop = stop
+        self._line = line.upper()
+        self._name = name
+        self._unit = "minutes"
+        self._state = None
+
+    @property
+    def name(self):
+        """Return the name of the sensor."""
+        return self._name
+
+    @property
+    def icon(self):
+        """Return the icon for the frontend."""
+        return ICON
+
+    @property
+    def unit_of_measurement(self):
+        """Return the unit of measurement."""
+        return self._unit
+
+    @property
+    def unique_id(self):
+        """Return a unique, HASS-friendly identifier for this entity."""
+        return f"{self._stop}_{self._line}"
+
+    @property
+    def state(self):
+        """Return the next departure time."""
+        return self._state
+
+    @property
+    def device_state_attributes(self):
+        """Return the state attributes of the last update."""
+        return {
+            ATTR_ATTRIBUTION: ATTRIBUTION,
+            ATTR_BUS_STOP: self._stop,
+            ATTR_LINE: self._line,
+        }
+
+    @Throttle(MIN_TIME_BETWEEN_UPDATES)
+    def update(self):
+        """Get the next bus information."""
+        try:
+            self._state = self._ibus_client.get_stop_forecast(self._stop, self._line)
+        except HTTPError:
+            _LOGGER.error(
+                "Unable to fetch data from TMB API. Please check your API keys are valid."
+            )
diff --git a/requirements_all.txt b/requirements_all.txt
index dd88fbe406e..f41f3456ba5 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1965,6 +1965,9 @@ thingspeak==1.0.0
 # homeassistant.components.tikteck
 tikteck==0.4
 
+# homeassistant.components.tmb
+tmb==0.0.4
+
 # homeassistant.components.todoist
 todoist-python==8.0.0