A connector attachable to a cable having a jacket and a plurality of core wires, the connector being mateable with an object, which has a mating fit portion, along a front-rear direction, wherein: the connector comprises an inner structure and an outer housing; the inner structure comprises a fit portion, a plurality of wire connection portions, a protection portion and a cable-holding portion; the fit portion is fit to the mating fit portion under a mated state where the connector and the object are mated with each other; the fit portion comprises a plurality of terminals, a holding member and a shell; the holding member holds the terminals; the shell encloses the terminals and the holding member in a perpendicular plane (YZ-plane) perpendicular to the front-rear direction; the wire connection portions and the protection portion are located rearward of the fit portion; the wire connection portions are configured to connect the terminals with the core wires of the cable, respectively; the protection portion protects the wire connection portions; the cable-holding portion is located rearward of the protection portion; the cable-holding portion is configured to directly or indirectly hold the jacket of the cable in the perpendicular plane; the outer housing has a front holding portion, an accommodation portion and a rear holding portion; the accommodation portion accommodates the protection portion; the front holding portion is located forward of the accommodation portion and holds the shell to prevent a movement of the fit portion in the perpendicular plane; the rear holding portion is located rearward of the accommodation portion and holds the cable-holding portion to prevent a movement of the cable-holding portion in the perpendicular plane; and the inner structure comprises an insulation member, characterized in that each of the protection portion and the cable-holding portion is a part of the single insulation member, and are formed integrally. the connector comprises an inner structure and an outer housing; the inner structure comprises a fit portion, a plurality of wire connection portions, a protection portion and a cable-holding portion; the fit portion is fit to the mating fit portion under a mated state where the connector and the object are mated with each other; the fit portion comprises a plurality of terminals, a holding member and a shell; the holding member holds the terminals; the shell encloses the terminals and the holding member in a perpendicular plane (YZ-plane) perpendicular to the front-rear direction; the wire connection portions and the protection portion are located rearward of the fit portion; the wire connection portions are configured to connect the terminals with the core wires of the cable, respectively; the protection portion protects the wire connection portions; the cable-holding portion is located rearward of the protection portion; the cable-holding portion is configured to directly or indirectly hold the jacket of the cable in the perpendicular plane; the outer housing has a front holding portion, an accommodation portion and a rear holding portion; the accommodation portion accommodates the protection portion; the front holding portion is located forward of the accommodation portion and holds the shell to prevent a movement of the fit portion in the perpendicular plane; the rear holding portion is located rearward of the accommodation portion and holds the cable-holding portion to prevent a movement of the cable-holding portion in the perpendicular plane; and the inner structure comprises an insulation member, characterized in that each of the protection portion and the cable-holding portion is a part of the single insulation member, and are formed integrally.