In an imaging apparatus, a first slope is formed that inclines toward a second flash-unit cam at an end face of a first flash-unit cam on the second flash-unit cam side at a first position where a flash-unit follower is located on the first cam when the flash-unit follower is engaged with the first flash-unit cam and the lens barrel unit is changed into wide angle state, and a second slope is formed that inclines toward the first flash-unit cam at an end face of the second cam on the first flash-unit cam side at a second position where the flash-unit follower is located on the second flash-unit cam when the flash-unit follower is engaged with the second flash-unit cam and the lens barrel unit is changed into a wide angle state.