An electronic endoscope (10) has an insert section (17) to be introduced into a human body cavity. A distal portion (17a) of the insert section contains a CCD (38) and a printed circuit board (43, 61) to which the CCD is bonded. In the insert section, a cable bundle (28) being a bundle of coaxial cables (48, 65) extends. Each coaxial cable consists of a signal line (50, 66), insulation (51) surrounding the signal line, a braided wire (52) surrounding the insulation, and an insulating jacket (53). The cylindrical braided wire is stranded into a single line, and is soldered as a ground line (52) to a ground terminal (47) of the printed circuit board. The signal line is pulled out of the coaxial cable with a length longer than the ground line. The signal line is soldered to an input/output terminal (46) of the printed circuit board with a larger sag than the ground line.
