A camera of the type in which a film magazine is inserted axially into a film loading chamber, has a film loading door rectilinearly movable for closing and opening the film loading chamber, and a back door pivotally mounted on the back of the camera for closing and opening a guideway between a film pressure plate and the camera body. Rectilinear movement of the film loading door to its open position causes a latching member to disengage itself with the back door. On the other hand, the film loading door is restricted in its open position by engagement with the latching member and, in turn, allowed to return under the influence of a spring force to its closed position by pivotal movement of the back door which releases this engagement.