40 pivotally mounted in the camera body the interrelating lever 40 has three arms 41 42 and 43 the second arm 42 is pushed to the right by a cam 44 which rotates clockwise when the shutter release is completed therefore when the shutter release is completed the second arm 42 of the lever 40 is pushed to the right and the first arm 41 is moved upward to slide the slidable rod 66 upward the slidable rod 66 has a head 66a at the top end thereof which is projected upward out of the base portion 61 when the slidable rod 66 is slid upward the head 66a is pushed downward by a tapered portion 34 integrally fixed to the wind up member 30 when the wind up member 30 is rotated clockwise thus the slidable rod 66 is moved down when the film wind up is completed and moved up when the shutter release is completed the third arm 43 of the interrelating lever 40 is provided with a second switch 52 of the shutter release circuit so that the second switch 52 may be opened in response to the counterclockwise rotation of the interrelating lever 40 and closed in response to the clockwise rotation thereof the shutter release circuit includes a first switch 51 which is closed upon the second stage of depression of the shutter release button 50 a second switch 52 which is closed upon the clockwise rotation of the interrelating lever 40 a third switch 53 which is closed by the tapered position 34 of the wind up member 30 while the tapered portion 34 is in the start position indicated.