Electrical connection structure

The invention provides an electrical connection structure which suppresses abrasion of a connection part. The electrical connection structure (1) includes a first terminal (2) and a connector (3) detachably connected to the first terminal. The connector is provided with: a housing (24) having a housing main body (26) and a housing groove (27) for housing a first terminal; and the at least one second terminal (25) is arranged in each accommodating groove and is in contact with the corresponding first terminal. The first terminal has a locking hole (21) recessed in the Y direction. The housing is provided with: a locking part (28) which is supported by the housing main body part and can be displaced to a first position and a second position in the Y direction; and an operation part (29) coupled to the locking part. When the locking portion is located at the first position, the locking portion locks the corresponding locking hole, thereby limiting the movement of the first terminal relative to the housing in the