The theme of the invention lies in providing an optical film having excellent bending resistance and excellent stability of optical characteristics at high temperatures and high humidity. This opticalfilm contains a polyamideimide resin and satisfies the relationship of formula: delta(Hz)<0.5 (1). In formula (1), delta(Hz) represents Hza-Hzb, and Hza represents the haze (%) of the optical film after a mandrel test (according to JIS K 5600-5-1: 1999), and the mandrel test is recovered to be planar after being bent once at the bending radius of 1 mm at room temperature; Hzb represents the haze(%) of the optical film before the mandrel test.