The invention relates to a wiper for vehicle windows that comprises structural members comprising at least a longitudinal substrate (10); a stiffening rod (20) arranged as an extension of said substrate (10); a wiping blade (30) attached to said substrate (10); an accessory (40) including at least one tube (42a, 42b) for spraying a washing liquid, said accessory (40) being assembled on said substrate (10). According to the invention, the wiper further includes means (60a, 60b) for heating the washing liquid, said heating means being included in the tubes (42a, 42b) of the accessory (40).