A vibration isolation device, comprising: a tubular first attachment member coupled to one of a vibration generating part and a vibration receiving part, and a second attachment member coupled to the other thereof; an elastic body which couples both the attachment members (11, 12) together; and a partition member which partitions a liquid chamber within the first attachment member having a liquid enclosed therein into a first liquid chamber and a second liquid chamber, wherein the first attachment member, the second attachment member, and the elastic body are disposed coaxially with a common axis, wherein at least one of the first liquid chamber and the second liquid chamber has the elastic body as a portion of a wall surface thereof, wherein a communication part which communicates with the first liquid chamber and the second liquid chamber is provided on the partition member, and wherein the communication part includes an intermediate chamber which is disposed inside the partition member, a first communication passage which communicates with the intermediate chamber and the first liquid chamber, and a second communication passage which communicates with the intermediate chamber and the second liquid chamber, characterized in that: a barrier rigid body, which faces at least one of the first communication passage and the second communication passage and which is formed integrally with the partition member, is disposed inside the intermediate chamber, the barrier rigid body is coupled to center parts on an inner peripheral surface of the intermediate chamber in a direction of the common axis via a pair of bridge parts, each bridge part being formed in a rod shape and extending to be orthogonal to a flow passage axis of the communication part, the pair of bridge parts is disposed such that the flow passage axis is interposed therebetween in the flow passage radial direction, a pair of passing gaps are provided between the pair of bridge parts around the flow passage axis of the communication part and between the outer peripheral surface of the barrier rigid body and the inner peripheral surface of the intermediate chamber and are open toward both sides in a direction of the common axis, and the liquid which is branched by the barrier rigid body is able to pass through the pair of passing gaps. a tubular first attachment member coupled to one of a vibration generating part and a vibration receiving part, and a second attachment member coupled to the other thereof; an elastic body which couples both the attachment members (11, 12) together; and a partition member which partitions a liquid chamber within the first attachment member having a liquid enclosed therein into a first liquid chamber and a second liquid chamber, wherein the first attachment member, the second attachment member, and the elastic body are disposed coaxially with a common axis, wherein at least one of the first liquid chamber and the second liquid chamber has the elastic body as a portion of a wall surface thereof, wherein a communication part which communicates with the first liquid chamber and the second liquid chamber is provided on the partition member, and wherein the communication part includes an intermediate chamber which is disposed inside the partition member, a first communication passage which communicates with the intermediate chamber and the first liquid chamber, and a second communication passage which communicates with the intermediate chamber and the second liquid chamber, characterized in that: a barrier rigid body, which faces at least one of the first communication passage and the second communication passage and which is formed integrally with the partition member, is disposed inside the intermediate chamber, the barrier rigid body is coupled to center parts on an inner peripheral surface of the intermediate chamber in a direction of the common axis via a pair of bridge parts, each bridge part being formed in a rod shape and extending to be orthogonal to a flow passage axis of the communication part, the pair of bridge parts is disposed such that the flow passage axis is interposed therebetween in the flow passage radial direction, a pair of passing gaps are provided between the pair of bridge parts around the flow passage axis of the communication part and between the outer peripheral surface of the barrier rigid body and the inner peripheral surface of the intermediate chamber and are open toward both sides in a direction of the common axis, and the liquid which is branched by the barrier rigid body is able to pass through the pair of passing gaps. a barrier rigid body, which faces at least one of the first communication passage and the second communication passage and which is formed integrally with the partition member, is disposed inside the intermediate chamber, the barrier rigid body is coupled to center parts on an inner peripheral surface of the intermediate chamber in a direction of the common axis via a pair of bridge parts, each bridge part being formed in a rod shape and extending to be orthogonal to a flow passage axis of the communication part, the pair of bridge parts is disposed such that the flow passage axis is interposed therebetween in the flow passage radial direction, a pair of passing gaps are provided between the pair of bridge parts around the flow passage axis of the communication part and between the outer peripheral surface of the barrier rigid body and the inner peripheral surface of the intermediate chamber and are open toward both sides in a direction of the common axis, and the liquid which is branched by the barrier rigid body is able to pass through the pair of passing gaps.