ON-BOARD CAMERA DEVICE

An on-board camera device includes a camera unit, a hood member, a thermally conductive member, a heater device, and a temperature measurement element. The camera unit captures an image of an ambient environment through a window glass of a vehicle. The hood member blocks an unnecessary light beam from outside and suppresses background reflection on the window glass. The thermally conductive member is fixed to the hood member to thermally contact with the window glass. The heater device contacts with the thermally conductive member and removes dew condensation and fog adhering to the window glass. The temperature measurement element is provided at the heater device and partly contacts with the thermally conductive member. The temperature measurement element detects a temperature state of the heater device during operation of the heater device and a temperature state of the window glass through the thermally conductive member during non-operation of the heater device.