To provide a facet emitting multi-beam semiconductor laser having a structure capable of reducing the difference in the rotation of polarization of a laser beam.

A facet emitting multi-beam semiconductor laser includes juxtaposed stripe-shaped light-emitting portions 10, the number of which is N (where N2), wherein a separation groove 160 that electrically separates the light-emitting portions 10 from each other is provided between the light-emitting portions 10; a first recess 161 that is partly discontinuous is provided outside a first light-emitting portion 101; and a second recess 162 that is partly discontinuous is provided outside an Nth light-emitting portion 102.