This optical receptacle has an optical receptacle main body, a supporting member, and an adhesive. The optical receptacle main body includes a first optical surface, second optical surface, reflecting surface, first fit-in section, and recessed section. The supporting member includes: a supporting member main body; a second fit-in section fitted in the first fit-in section; and a through hole, which faces the recessed section, and which is opened in the inner-side surface of the supporting member main body, and in the outer-side surface on the reverse side of the inner-side surface. The adhesive is in contact with the inner surface of the recessed section, and the supporting member. The optical receptacle main body is disposed further toward the supporting member side than an installation surface.