An external mixture pneumatic liquid sprayer comprises a casing (1) with a guiding surface (2) provided with a V-shaped groove (4). At the bottom part of the groove (4) is located a nozzle (5) supplying compressed air. The sprayer may have different variants, for example a variant where the guiding surface is provided with two conjugating grooves of V-shaped and U-shaped cross-section, or a variant where the bottom part of the groove widens in the direction of liquid flow.
