Patent ID: 8018522

Claim:
A lens barrel, comprising: a first lens configured to take in a light flux incident along a first optical axis; a bending member including a reflecting surface reflecting the light flux passing through the first lens to a direction along a second optical axis intersecting with the first optical axis; a second lens configured to take in the light flux passing through the bending member; and a lens frame to which the bending member is fixed by an adhesive agent, the lens frame including at least one opening portion in which either the first lens or second lens is retained, a retaining portion arranged in a more inner position than the opening portion and in which the bending member is contained, and a plurality of concave portions arranged on the periphery of the retaining portion and being open toward the opening portion, the adhesive agent being filled in the concave portions, and the concave portions being arranged inside the opening portion when viewed from a direction of the first or second optical axis through the opening portion.