A fruit harvesting unit mounted on a harvesting machine. The harvesting unit comprises a straddling chassis delimiting a harvesting tunnel in which plants to be shaken are introduced successively to move through said tunnel between a front opening and a rear opening of said tunnel. The harvesting unit has a main shaker system including two shaker devices disposed on respective sides of the harvesting tunnel to delimit transversely a central part of said tunnel, and an additional shaker system that is mounted on the straddling chassis and comprises two shaker devices disposed on respective sides of the harvesting tunnel to delimit transversely a front upper part of said tunnel.
