An electrical connection structure includes: a first unit including a terminal; and a second unit including a connection terminal. The electrical connection structure is configured by mounting the second unit to the first unit such that the connection terminal is electrically connected to the terminal. The terminal has a plate-shaped tab. The connection terminal includes a receptacle formed with a connection groove into which the tab is inserted, and a spring contact provided on inner side surfaces of the connection groove. The spring contact comes into elastic contact with outer surfaces of the tab inserted into the connection groove.