PROBLEM TO BE SOLVED: To provide an imaging apparatus in which a diameter of a distal end can be made smaller while optical performance of the imaging apparatus including an objective optical system can be prevented from degradation.SOLUTION: A recessed portion 37c is provided in a movable frame projecting portion 37b of a movable frame 37, which is arranged in a second holding frame 35 for forming a fixed frame secured to the distal end, and which holds a movable lens 31b, and a spring 61 is compressed and disposed to generate a rotational energizing force within a through-hole 35c in a holding frame projecting portion 35b which forms a projecting portion of the second holding frame 35, to thereby apply the rotational energizing force to the movable frame projecting portion 37b, so that a movable lens 31b in a plane perpendicular to the optical axis O is positioned in a clearance 39.SELECTED DRAWING: Figure 3A
