To provide flexible printed circuit board capable of effectively utilizing space without causing a useless space in an occupied area.

The 1st plane part 2a of this flexible printed circuit board 2 is arranged along the front subject side of a camera main body 1, and plural electric elements 6 are mounted on either surface of the 1st plane part 2a. The 2nd plane part 2b of the board 2 on which a main IC 7 is mounted is bent nearly perpendicularly to the 1st plane part 2a by a 1st bending part 2c, and arranged in space surrounded by a form 3 and a release SW holding member 5. The 2nd plane part 2b is provided with a connection part 2d extended along the film side of the latter half part of the member 5 so as to be connected to another different flexible printed circuit board, and provided with a 3rd plane part 2e on which a release SW 4 is mounted. The 3rd plane part 2e is U-turned by a 2nd bending part 2h and a 3rd bending part 2i, and arranged along the upper surface part of the member 5.