Vehicle lamp device

The present invention provides a vehicle lamp device capable of relieving the impact acting from the vehicle lamp device to an obstacle, and thereby achieving a simple and relatively spaceless structure. The vehicle lamp device comprises a thin grooved portion 17 (a displacement allowing structure) for allowing the housing 3 to be displaced. The displacement allowing structure is provided in an interfering portion of the housing 3 interfering with a front side frame 16 (a vehicle body member) which locates in the displacement area where the housing 3 is displaced and interrupts the housing 3 to be displaced when the vehicle lamp device collides with an obstacle.