Wiper blade adapter, in particular for a motor vehicle windshield wiper device

A wiper blade adapter, comprising a basic body (12), characterized by a spraying unit (10) which is arranged on the basic body (12) and is provided for spraying a liquid onto a motor vehicle windshield (64), wherein at least one latching means (16) is disposed on the basic body (12) for coupling the basic body (12) to the spraying unit (10), the at least one latching means (16) having a barb-like shape configured to be elastically deflected by the spraying unit (10) while the spraying unit (10) is being coupled to the basic body (12), wherein the basic body (12) extends along a longitudinal direction (22), wherein the spraying unit (10) includes a latching body (66) having a wedge shape, wherein the latching body (66) is configured to engage the at least one latching means (16) and press the at least one latching means (16) inwardly toward the basic body (12) by sliding the spraying unit (10) along the longitudinal direction (22), wherein the basic body (12) includes a guide rail (24) that has a varying width along a longitudinal direction (22) of the basic body (12), wherein the spraying unit (10) includes a receiving region (38) configured to slide over the guide rail (24) along the longitudinal direction (22), and wherein both the guide rail (24) and the receiving region (38) are t-shaped.