A detergent dispenser for a washing machine comprises a box shaped recess and a washing agent drawer slidably mounted in the recess, such drawer being provided with a plurality of separate compartments for containing wash and/or rinse products to be flushed by an incoming water flow into the tub of the washing machine. The detergent dispenser has a channel in the bottom of the recess for directing the incoming water flow towards a predetermined zone of the box shaped recess without flowing through the drawer.