The present invention is principally a device for transferring a nuclear fuel canister between a container for transporting said canister and a device for storing said canister. The transfer device comprises a body and a slide of longitudinal axis, capable of sliding in said body along its longitudinal axis (Y), said slide comprising at least a first compartment (C1), for removing a plug from the transport container and a plug from the storage device, and a second compartment (C3) for allowing the canister to pass from the transport container to the storage device and, conversely, means for sealing the transfer between the transport container and a transfer device and between the transfer device and the storage device.