A vibration damping device (10) includes a first attachment member (11) and a second attachment member (12), an elastic body (13) configured to couple the attachment members (11 and 12) to each other, and partition members (16) configured to partition a liquid chamber in the first attachment member (11) in which a liquid (L) is sealed into the first liquid chamber (14) and the second liquid chamber (15). A communicating passage (30) configured to communicate the first liquid chamber (14) with the second liquid chamber (15) is provided in the partition members (16). Flow-changing protrusions (31 and 32) protruding inward in a radial direction of the communicating passage (30) and configured to change a flow of the liquid flowing in the communicating passage (30) in an axial direction of the communicating passage (30) are provided in an inner circumferential surface of the communicating passage (30). The communicating passage (30) and the flow-changing protrusions (31 and 32) are formed symmetrically with respect to an axis (O) of the communicating passage (30) when viewed in a longitudinal cross section passing through the axis (O) and the flow-changing protrusions (31 and 32). Projecting ends of the flow-changing protrusions (31 and 32) form inner circumferential edges of passing holes (31c and 32c) which are open toward both sides in the axial direction. According to the vibration damping device (10), occurrence of abnormal noise is suppressed while product features are secured so that simplification of a structure and facilitation of manufacture can be achieved.