Seal structure of the multi-core cable

The seal structure of a multi-core cable (11) (12), first to fourth wires (13A, 13B, @ 13 C, 13D) is a sheath multi-core cable that is surrounded by (14) (11), the sheath (14) of the first to fourth wire while being fitted on the end portion (14A) (13A, 13B, 13C, 13D) first to fourth through holes each is penetrated (22A, 22B, 22C, 22D) and having a rubber plug (15), the cap (17) for pressing the fitted on to the rubber plug (15) inwardly rubber plug (15), a sheath holding portion for holding the sheath (14) to (60) having a holder (52) having a cap holding portion for holding the cap (17) and (62) together comprises.