In a vibration isolator of the present invention, an orifice passage (24) configured to allow a main liquid chamber (14) and an auxiliary liquid chamber (15) to communicate with each other, a plurality of first communication holes (42a) configured to allow the main liquid chamber and an accommodation chamber (42) to communicate with each other, and a second communication hole (42b) configured to allow the auxiliary liquid chamber and the accommodation chamber to communicate with each other are formed in a partition member (16), a tubular member (21) that protrudes in an axial direction toward an elastic body is formed on a first wall surface (16b) of the partition member in which the first communication holes are opened and which constitutes part of an inner surface of the main liquid chamber, and the plurality of first communication holes are opened in both of an inner portion (16f) of the first wall surface positioned inside the tubular member and an outer portion (16g) of the first wall surface positioned outside the tubular member.