An endoscope (12) includes an elongated insertion section (22) inserted into a body cavity and a hard base section (24) provided on a proximal end side of the insertion section (22). Transmission lines, e.g., a light guide fiber (52b, 52c), a CCD cable (54c, 54d), and others are inserted from the inside of the insertion section toward the base section (24). A holding portion (120) which holds the transmission lines while restricting movement of the insertion section (22) and the base section (24) in a direction perpendicular to an axial direction is disposed in the base section (24). A connector portion (28) which connects end portions of the extended transmission lines through the holding portion with an external device is provided to the base section (24).
