best angle for directing the resilient pressure applied to the pinch roller 5 by means of the spring member 8 so as to allow the sandwiching of the film f between the pinch plate 4f and the pinch roller 5 as will be seen from fig3 a and 3b a pair of release arms 6 are provided at the top and bottom sides 4d of the back tray 4b the release arms are pivotally fastened to the back tray 4b by means of a journal pin 7 provided on the back tray at a portion thereof near the end face 4d which defines their pivoting axis the release arms 6 include engaging tips 6a and are located at a portion of the back tray 4b which is near the end edge 4b so that the tips 6a of the release arms may protrude beyond the edge 4d the release arms 6 are urged in the direction indicated by the arrow b by means of a spring not shown in the fig3 a and 3b when the film magazine 4 is not received on the body 1 of the camera the release arms 6 are urged by the spring so as to be positioned in a position as shown in fig3 a so that the engaging tips 6a protrude beyond the end surface 4d at the ends of the release arms 6 opposite from the engaging tips 6a engaging surfaces 6b are formed each of which engages the corresponding pinch roller 5 for applying an urging pressure thereto so as to slide the pinch roller 5 longitudinally within the guide slots 4e the operation of the above described embodiment of a film magazine in accordance with.