Abstract: A simplified apparatus selectively supports a carrier within a pneumatic tube transportation system station, and releases the carrier for transport within the system. The apparatus responds to controlled air pressures within the station, and to the momentum of the carrier for holding and releasing the carrier. In a preferred embodiment of the apparatus, an interior mounting, adapted to be disposed within a customer or teller station, pivotably mounts a detent member. A biasing device having elasticity, such as a torsion spring, biases the detent member to a first position wherein a contact portion of the member supports the carrier. A release device responds to controlled air pressures to urge the detent member against the biasing device to release the carrier. The present invention also pertains to a station incorporating the disclosed apparatus, and to a banking service pneumatic tube system including at least one station equipped with the disclosed apparatus.