A surface-emitting laser diode capable of being manufactured easily at low cost, and capable of stabilizing the polarization direction of laser light in one direction and achieving higher output is provided. A light emission section 20 in which a lower first DBR mirror layer 12, a lower second DBR mirror layer 13, a lower spacer layer 14, an active layer 15 including a light emission region 15A, an upper spacer layer 16, a current confinement layer 17, an upper DBR mirror layer 18 and a contact layer 19 are laminated in this order is included on a substrate 10. The lower first DBR mirror layer 12 includes an oxidation section 30 nonuniformly distributed in a direction rotating around the light emission region 15A in a periphery of a region corresponding to the light emission region 15A. The oxidation section 30 includes a pair of multilayer films 31 and 32, and is formed by oxidizing a low refractive index layer 12A. Thereby, an anisotropic stress according to nonuniform distributions of the multilayer films 31 and 32 is generated in the active layer 15.