PURPOSE: To drastically simplify the structure of an exchange device, by providing a pair of locking plates freely closably and forming the structure of holding all of the storing suction nozzles with their engagement by this locking plate.

CONSTITUTION: A support base 4 supporting a lot of suction nozzles 3 freely insertably and a pair of locking members 8a, 8b which block the dislocation with their engagement with all of the suction nozzles 3 supported on the support base 4 in a closing state and born freely turnably and closably and which permit the dislocation of the suction nozzle 3 from the support base 4 in an opening state, are suction nozzle 3 form the support base 4 in an opening state, are provided. Moreover, an energizing member 9 which energizes these locking members 8a, 8b their rotation in the opening direction and a driving means (air cylinder) 12 which opens the locking members 8a, 8b against the energizing force of the energizing member 9 are arranged and the suction nozzles 3 in multikinds are automatically exchanged quickly and surely.