In a conventional lamp for vehicles, there may be a case in which any shuddering is generated. The present invention comprises a semiconductor-type light source, a lens, a lens holder, and a heat sink member. An attachment hook section is provided in the lens holder. Attachment sections are provided in the heat sink member. The attachment sections of the heat sink member are interposed between the lens holder and the attachment hook section. The present invention is capable of attaching the lens holder to the heat sink member without any shuddering being generated.