PURPOSE: To transmit many signals with high reliability by curving and arranging a flexible printed board around an optical path of photography.

CONSTITUTION: A main-body fitting part 14a at one end of the flexible printed board 14 is connected to a main-body side substrate and fixed to a main camera body 11, and a front-plate fitting part 14f at the other end is connected to a front-plate side substrate and fixed to a front plate 16 to make an electric connection with the side of the front plate 16 on the side of the main camera body; 11 while the optical path of photography is surrounded. Then, the center part of the board 14 is curved gently about mutually orthogonal axes X and Y, and the curved part expands and contracts as the front plate 16 moves forth and back. When the front plate 16 moves back, the board 14 absorbs compression at two curved parts having their centers on the axes X and Y to slant plane parts 14b and 14c in horizontal planes and plane parts 14d and 14e in vertical planes forward and backward respectively as shown by a two-dot chain line, so that almost no stress is applied to the board 14. Further, even when the front plate 16 moves forth, similar operation is performed and no stress is applied.