FIGS. 3A, 3B and 3C show diagrams each representing an engage-member and an engagement claw in the door mirror device for a vehicle according to the first embodiment of the present invention: FIG. 3A is a perspective view showing a state before the engage-member and the engagement claw are engaged with each other; FIG. 3B is a perspective view showing a manner in which the engage-member and the en