A wiper system 1 has a wiper blade 5 for performing a reciprocating wiping operation on a windshield glass 6 and a brushless motor 2 for causing the wiper blade 5 to perform the reciprocating wiping operation. The motor used as the brushless motor 2 is provided with a rotary shaft for reciprocating the wiper blade 5, has a degree of operation freedom in three axial directions, and is rotatable about axes of two directions orthogonal to the rotary shaft. The wiper blade 5 operates at error angles θ different in direction between during a forward-path wiping operation and during a return-path wiping operation. When the wiper blade 5 reaches a reversing position, the brushless motor 2 is made to rotate about an axis extending in a extending direction of the wiper blade 5 to change the error angle θ.