Abstract: A magazine insertion slot opening/closing device is able to automatically close a slide door after being opened. The front side of a magazine insertion slot formed in a decorative panel is covered by an outer door and an inner door. Both the doors are coupled to each other through first and second door plates, a gear damper and a rack plate. With this coupling structure, when one of the outer door and the inner door is moved, the other is also moved in the same direction in an interlocked manner. A locking link is urged by a lock spring in the locking direction to lock the doors in the open state through the first door plate. When closing the doors, the locking link is operated to release the doors from the locked state by rotating a cam gear with rotation of a motor or manually moving the outer door to some extent in the closing direction, whereby the doors are closed under a urging force of a door spring.