To provide a vehicular mirror device for adjusting a position of a mirror other than at a driver's seat according to a door opening amount at the driver's seat and enabling the driver to easily confirm backward view via the mirror, when the driver opens the door at the driver's seat and leans out of the door to confirm the backward view when a vehicle is retreating.

A retreating state of the vehicle 100 is detected by a retreating state determination means, the opening amount of the door DD at the driver's seat is detected by a door opening amount detection means, and a mirror control means adjusts a direction of the mirror based on the opening amount of the door DD at the driver's seat. Accordingly, the opening amount of the door DD at the driver's seat interlocks with the adjustment of the mirror direction. The direction of the mirror can be automatically changed when the vehicle retreats in a state of opening the door DD at the driver's seat.