A method for manufacturing an elongated windshield wiper blade includes providing a tandem wiper blade (1) made in one piece of an elastomeric material, which is composed of two wiper blades (2, 3) integrally joined together, and subsequently cutting the tandem wiper blade (1) so as to separate the two wiper blades (2, 3) each having a wiping head (4) facing away from a windshield to be wiped and a wiping lip (5) to be placed in abutment with a windshield to be wiped. The two wiper blades (2, 3) forming the tandem wiper blade (1) are integrally joined together at the location of their wiping heads (4) facing towards each other, wherein the tandem wiper blade (1) is cut into the two separate wiper blades (2, 3) along their wiping heads (4) facing towards each other.