A magnetoresistance effect element where asymmetry of an inversion current due to a leakage magnetic field from a magnetization fixed layer is decreased. A magnetoresistance effect element includes a first ferromagnetic layer whose magnetization direction is variable, a second ferromagnetic layer whose magnetization direction is fixed, and a nonmagnetic layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer which are laminated in a first direction which is a lamination direction, where both the first ferromagnetic layer and the second ferromagnetic layer are curved so that central portions of the first and second ferromagnetic layers protrude with respect to outer circumferential portions in the first direction, and protruding directions of the central portions are opposite to each other so that a distance between the outer circumferential portions is larger than a distance between the central portions in the first direction.