An imaging apparatus includes a first member including a holding member, the retaining member holding a lens; a second member surrounding the first member; an imaging device arranged opposite to the first member and the lens; and a driving member arranged in a region adjacent to the first member driving the first member in the vertical direction relative to the imaging device. The first member includes at least a first portion and a second portion, the first portion having a first outer diameter and the second portion having a second outer diameter smaller than the first outer diameter, the first and second portions respectively having a first corner and a second corner, the first and second corners respectively having a first cutout portion and a second cutout portion. At least a portion of the driving member is disposed at a region corresponding to the second portion.