A light-emitting module with a cooling function includes a heat sink, a light-emitting element and a fitting member. The heat sink has a coupling face and at least one first assembling portion. The light-emitting element is coupled with the coupling face of the heat sink. The fitting member includes at least one positioning portion having at least one second assembling portion. The at least one second assembling portion is coupled with the at least one first assembling portion of the heat sink to position the light-emitting element between the at least one positioning portion and the heat sink.