A power feeding device (10) which constitutes a contact power feeding system (12) is provided with a pair of insulator parts (56) which support respective suspended wires (26p, 26n), and a bracket (46) which includes a pair of holding plates (52a, 52b) to which the respective insulator parts (56) are secured. The bracket (46) is formed such that a contact surface (78a) of one suspended wire (26n) with respect to a charging arm (20) is directed obliquely upward to a traveling road (200) side and a contact surface (78b) of the other suspended wire (26p) with respect to the charging arm (20) is directed obliquely downward to the traveling road (200) side.