To stably slide lens units on a guide member (guide shaft) while reducing the number of the parts of a moving mechanism for finder objective lenses.

The finder mechanism of the camera comprises: first and second lens units which move in the direction of an optical axis during variable magnification of a finder optical system; a guide member which guides each lens unit in the direction of the optical axis of the finder optical system; a first engagement part, located on the first lens unit, which is engaged with the guide member and thus guided; a second engagement part, located on the second lens unit, which is engaged with the guide member and thus guided. In the finder mechanism of the camera, the first engagement part is engaged with the guide member across the second engagement part.