Endoscope with holding member having multiple independent wall parts

An endoscope comprising:

• an image pick-up device at a distal end part of an insertion part capable of being inserted into a body cavity,
• wherein the image pick-up device includes
• a lens barrel that holds an imaging lens;
• a solid-state image pick-up element that photoelectrically converts imaging light incident on an image reception surface via the imaging lens and has a rectangular shape as an outer peripheral shape of the image reception surface;
• and
• a holding member that holds the solid-state image pick-up element in a state where the image reception surface intersects a longitudinal direction axis of the insertion part,
• wherein the holding member has a fitting part fitted to the lens barrel, and an extending wall part that extends in the longitudinal direction axis from the fitting part to cover at least a portion of the outer peripheral surface of the solid-state image pick-up element,
• wherein the fitting part and the extending wall part are integrally configured,
• wherein the extending wall part includes two wall parts that respectively cover two of four side surfaces that constitute the outer peripheral surface of the solid-state image pick-up element, and
• wherein the two wall parts are located inside a circumscribed circle circumscribed on a projection outermost diameter end of the solid-state image pick-up element in a case where the holding member holding the solid-state image pick-up element is projected on a plane orthogonal to the longitudinal direction of the insertion part, two corners of each of the two wall parts are inscribed on the circumscribed circle the case where the holding member holding the solid-state image pick-up element is seen in the longitudinal direction, and four peaks that constitute an outer periphery of the solid-state image pick-up element are inscribed on the circumscribed circle in a case where the holding member holding the solid-state image pick-up element is projected on a plane orthogonal to the longitudinal direction.