An electrical connection device has a first insulating body. A strip-shaped first conductor is accommodated in the first insulating body. The first conductor as a whole is arranged horizontally to electrically connect backward with a first docking component. A bottom surface of the first conductor has a front edge, and a contact area extends backward from the front edge. A second docking component includes a second conductor located below the first conductor. The second conductor has a front end, a rear end, and a top surface connecting the front and rear ends. An elastic body is located above the first conductor and downwardly abuts the first conductor. A pressing piece provides a downward force to make the first conductor downwardly abut the second conductor.