The present invention relates to a dishwasher (1) wherein the stiffness level of the stress means (7) is provided to be kept at different values by means of the adjustment means (8) during the washing cycle, the locking mechanism (4) is provided to remain locked completely by adjusting the stiffness level of the stress means (7) by means of the adjustment means (8) depending on the requirement at the respective stage of the washing cycle, the stiffness level is adjusted to the lowest value before or after the washing process for easily opening the door (3) and the locking mechanism (4) is provided not to open easily in order to prevent escape of steam from inside the body (2) during the washing process by adjusting the stiffness level of the stress means (7) by means of the adjustment means (8).