One aspect of the present invention provides a foldable light-transmitting optical film 10 for use in an image display device, comprising a resin base material 11 and a resin layer 12 provided on one surface 11A of the resin base material 11, wherein the shear storage elastic modulus (G′) of the optical film 10 at 25° C. in the frequency range from 500 Hz to 1000 Hz inclusive is 1 MPa or more and 200 MPa or less, and the shear loss elastic modulus (G″) of the optical film 10 at 25° C. in the frequency range from 500 Hz to 1000 Hz inclusive is 0.1 MPa or more and 100 MPa or less.