A wireless authentication device for a saddle-type vehicle performs authentication through wireless communication with a mobile terminal carried by a user. The wireless authentication device for a saddle-type vehicle includes a first operating input device, a light-emitting and notification part, and a controller. The first operating input device receives an operation of switching to a state in which a power engine is capable of being started. The light-emitting and notification part is provided in the first operating input device or in a portion surrounding the first operating input device, and performs a light-emitting and notification operation in which light is emitted to notify a user that authentication has succeeded. The controller determines whether authentication has succeeded through wireless communication with a mobile terminal, and if the authentication has been determined to have succeeded, causes the light-emitting and notification part to perform the light-emitting and notification operation.