A hollow stabilizer disposed in a vehicle suspension mechanism part comprises a torsion part (20); a bent part (21, 22) continuous with the torsion part (20); and an arm part (23, 24) continuous with the bent part (21, 22), and including, when a center of bending inside is 0° and a center of bending outside is 180° in a cross section in a pipe radial direction of the bent part (21, 22), eight regions (S1 to S8) defined in a circumferential direction of the cross section.