Wall simulator with irregular surface panel for training in attack and defense in volleyball. It causes the ball to bounce at unpredictable angles. Didactic and preparatory tool for the correction and improvement of the attack and coverage of the attack. Adjustable in height up to 370 cm, swiveling towards the inside or outside of the pitch, tiltable downwards, equipped with a ballast base with wheels (ballast not included. This simulator is equipped with a ball-catcher for the exercises of reception and precision, and, in addition, a ball carrier for balls.