To provide a light-emitting device and a projector capable of easily reducing labor and expenses required for maintenance.

The projector has a light source device 11 having a lamp holding section for holding a lamp 23 in which a substance emitting light by receiving the irradiation of microwaves 25 is sealed, an electric field induction rod 30 positioned with a gap to a lamp 23 outside the lamp 23 with the lamp 23 held at the lamp holding section and wrapping a conductive shaft with a dielectric body, and a microwave generation section 21 for generating the microwaves 25.