An endoscope apparatus includes an elongated tube, a imaging unit in the elongated tube, and a cable structure, including plural signal lines, having first and second ends, the first end being connected to the imaging unit. A cable connector is connected with the second end, and couplable with a socket connector connectively. The cable connector includes a circuit board having a width in a manner passable through the elongated tube in an axial direction. A conductive land is formed on the circuit board, and coupled to the second end. A terminal pattern is formed on the circuit board, for connective coupling by reception in the socket connector. An advancing tip is formed on a front side of the circuit board in the axial direction, for initially advancing upon entry of the circuit board in the elongated tube, to enable the conductive land and the terminal pattern to pass safely.
