WIPER ARM ADAPTER DEVICE, WIPER ARM WITH A WIPER ARM ADAPTER DEVICE, AND WIPER WITH A WIPER ARM WITH A WIPER ARM ADAPTER DEVICE

A wiper arm adapter device with at least one fluid channel () for conducting a fluid, and with at least one connecting unit () for connecting the fluid channel () to a fluid line element () of a wiper arm and/or to a wiper blade adapter (), wherein the connecting unit () has at least one connecting element () which at least partially delimits the fluid channel (). The connecting unit () has at least one valve element () which is arranged on the connecting element () and is configured to form the fluidic connection of the fluid channel () to the wiper blade adapter () in a closeable manner.