Provided is an optical film provided with a first layer containing a hydride of an aromatic vinyl compound/conjugated diene compound block copolymer, a second layer containing a norbornene-based polymer, and a third layer containing the hydride of an aromatic vinyl compound/conjugated diene compound block copolymer, the layers being provided in the stated order. The hydride of the aromatic vinyl compound/conjugated diene compound block copolymer is preferably a hydride of a styrene/isoprene copolymer. The styrene/isoprene copolymer ratio in the hydride of a styrene/isoprene copolymer is preferably 50/50 to 90/10.