The present invention relates to a multi-cap (30) for connecting a catheter and the multi-cap includes: a body (31) having an internal hole (32) formed in a longitudinal direction and having an end connected to a catheter (T)； a cover portion (40) disposed on an outer side of the body (31) in the longitudinal direction of the body (31) and spaced from the body (31) such that the catheter (T) is partially inserted between the outer side of the body (31) and the cover portion (40). Further, a spout (36) is formed at a second end of the body (31) to transmit an injection substance from the outside to the hole (32) and a capping part (60, 66) is connected to a side of the body (31) to selectively close the inlet of the spout (36).
