A vehicle air conditioning device includes a case, disposed inside a vehicle cabin separated from a forward compartment by a dash panel, in which an internal space (11a) is formed, a heater core that is disposed in the internal space, a hot water supply pipe that can supply hot water to the heater core, a hot water collecting pipe that can collect hot water that has passed through an interior of the heater core, and a holder member that holds the hot water pipes. The holder member includes a first holding portion that comes into contact with the hot water pipes, and a second holding portion that opposes the first holding portion, is provided across a gap, and comes into contact with the hot water pipes.