diff --git a/.coveragerc b/.coveragerc
index 5da330bb20a..ce80bef0a93 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -809,6 +809,7 @@ omit =
     homeassistant/components/nx584/alarm_control_panel.py
     homeassistant/components/oasa_telematics/sensor.py
     homeassistant/components/obihai/__init__.py
+    homeassistant/components/obihai/button.py
     homeassistant/components/obihai/connectivity.py
     homeassistant/components/obihai/sensor.py
     homeassistant/components/octoprint/__init__.py
diff --git a/homeassistant/components/obihai/button.py b/homeassistant/components/obihai/button.py
new file mode 100644
index 00000000000..0b84d40f4d2
--- /dev/null
+++ b/homeassistant/components/obihai/button.py
@@ -0,0 +1,59 @@
+"""Obihai button module."""
+
+from __future__ import annotations
+
+from pyobihai import PyObihai
+
+from homeassistant.components.button import (
+    ButtonDeviceClass,
+    ButtonEntity,
+    ButtonEntityDescription,
+)
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME, EntityCategory
+from homeassistant.core import HomeAssistant
+from homeassistant.exceptions import HomeAssistantError
+from homeassistant.helpers import entity_platform
+
+from .connectivity import ObihaiConnection
+from .const import OBIHAI
+
+BUTTON_DESCRIPTION = ButtonEntityDescription(
+    key="reboot",
+    name=f"{OBIHAI} Reboot",
+    device_class=ButtonDeviceClass.RESTART,
+    entity_category=EntityCategory.CONFIG,
+)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: ConfigEntry,
+    async_add_entities: entity_platform.AddEntitiesCallback,
+) -> None:
+    """Set up the Obihai sensor entries."""
+    username = entry.data[CONF_USERNAME]
+    password = entry.data[CONF_PASSWORD]
+    host = entry.data[CONF_HOST]
+    requester = ObihaiConnection(host, username, password)
+
+    await hass.async_add_executor_job(requester.update)
+    buttons = [ObihaiButton(requester.pyobihai, requester.serial)]
+    async_add_entities(buttons, update_before_add=True)
+
+
+class ObihaiButton(ButtonEntity):
+    """Obihai Reboot button."""
+
+    entity_description = BUTTON_DESCRIPTION
+
+    def __init__(self, pyobihai: PyObihai, serial: str) -> None:
+        """Initialize monitor sensor."""
+        self._pyobihai = pyobihai
+        self._attr_unique_id = f"{serial}-reboot"
+
+    def press(self) -> None:
+        """Press button."""
+
+        if not self._pyobihai.call_reboot():
+            raise HomeAssistantError("Reboot failed!")
diff --git a/homeassistant/components/obihai/connectivity.py b/homeassistant/components/obihai/connectivity.py
index 4a5c25b2101..93eeccd1bb7 100644
--- a/homeassistant/components/obihai/connectivity.py
+++ b/homeassistant/components/obihai/connectivity.py
@@ -45,7 +45,7 @@ class ObihaiConnection:
         self.host = host
         self.username = username
         self.password = password
-        self.serial: list = []
+        self.serial: str
         self.services: list = []
         self.line_services: list = []
         self.call_direction: list = []
diff --git a/homeassistant/components/obihai/const.py b/homeassistant/components/obihai/const.py
index 90bcd7736f8..764534d4791 100644
--- a/homeassistant/components/obihai/const.py
+++ b/homeassistant/components/obihai/const.py
@@ -12,4 +12,4 @@ OBIHAI = "Obihai"
 
 LOGGER = logging.getLogger(__package__)
 
-PLATFORMS: Final = [Platform.SENSOR]
+PLATFORMS: Final = [Platform.BUTTON, Platform.SENSOR]
diff --git a/homeassistant/components/obihai/sensor.py b/homeassistant/components/obihai/sensor.py
index 7524fbc7d47..61411b0ce27 100644
--- a/homeassistant/components/obihai/sensor.py
+++ b/homeassistant/components/obihai/sensor.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 
 from datetime import timedelta
 
+from pyobihai import PyObihai
 import voluptuous as vol
 
 from homeassistant.components.sensor import (
@@ -89,7 +90,7 @@ async def async_setup_entry(
 class ObihaiServiceSensors(SensorEntity):
     """Get the status of each Obihai Lines."""
 
-    def __init__(self, pyobihai, serial, service_name):
+    def __init__(self, pyobihai: PyObihai, serial: str, service_name: str) -> None:
         """Initialize monitor sensor."""
         self._service_name = service_name
         self._state = None