Disclosed is a trocar comprising a silencer. An end sealing assembly of a sheath of the trocar of the present application comprises an upper cover, a radial sealing assembly, a silencer and a lower cover； the silencer being an elastic body having one end installed on the radial sealing assembly and the other end installed on the lower cover； and the radial sealing assembly installed between the upper cover and the lower cover, Since the silencer holds up the radial sealing assembly, a gap between the upper cover and the radial sealing assembly is reduced, thereby avoiding an impact sound produced when a surgical instrument is withdrawn outwards, When the surgical instrument is advanced inwards, the impact sound produced when the surgical instrument is advanced inwards is avoided due to a buffer effect of the silencer.
