Abstract: The present invention relates to a method of assembling a monitor tube on a front frame, to the monitor thus obtained, and to the assembly machine. The method of assembling the monitor tube on the front frame of the monitor includes the following steps:a) placement of a front frame in a housing;b) blowing air through a nozzle to maintain the tube (105) in suspension;c) centering the tube (105) by way of two V shape support blocks (501, 521) displaced concentrically and simultaneously;d) reversing the direction of air through the nozzle to place a suction on the tube (105) and opening of the V shaped support blocks (501, 521);e) lowering of the tube (105) while connected to the suction to place it into contact with zones (1024) having a high coefficient of adhesion;f) joining the tube solidly to the front face (102);g) stopping the air flow to terminate the suction and release the assembled set.