To provide a loading device for properly fit connecters with each other easily and inexpensively without applying any extra force.

A guide member gives guidance regarding the moving direction of a holder which holds an electronic apparatus attachably/detachably in order to fit a connector of the electronic apparatus with a connector of a device main body. This rod-like guide member fitted into a hole of the holder is configured such that the shaft diameter is reduced via a taper at a position immediately before fitting, thereby relieving the restriction on the moving of the holder to a direction perpendicular to the fitting direction when the connector of the electronic apparatus and the connector of the device main body are fitted with each other.