A rotation restricting member (40) of a battery terminal unit (U) is provided with a main body (41) capable of restricting a mounting angle of a battery terminal (20) with respect to a battery post (12) by coming into contact with a battery (10) with the battery terminal (20) connected with the battery post (12), press-fitting portions (42) formed integral to the main body (41) and adapted to fix the rotation restricting member (40) to the battery terminal (20) by being press-fitted into an opening (32) formed in a side surface of a bolt holding portion (22), and a detachment restricting piece (56) formed integral to the main body (41) and adapted to restrict a movement of the main body (41) in a direction opposite to a pressing direction by being engaged with a terminal fitting (60) tightened to a stud bolt (24).