To effectively utilize space within a finder by appropriately arranging an optical block and a light source which emit light more efficiently and deciding the shape when the inside of the finder of a camera is illuminated.

A top cover 7 being the outer appearance part of the camera is provided at the upper part of the camera, and an unillustrated mount and a front cover 8 are similarly provided in front of the camera. An optical block 5 for irradiating a range-finding mark being a light deflecting member for superimposing the shape of the range-finding mark being the light deflecting member provided on an SI plate 3 on a primarily formed image on a focusing screen 2, masks M1, M2, M3, M4 and M5 for restricting luminous flux and the light source LED 63 are arranged at the upper part of a pentagonal prism 4.