For  evaluation  of respiratory capacities, the amount of VC(Vital Capacity),

   FVC (Forced Vital Capacity), FEV (Forced Expiratory Volume in one second)    

   were   measured   in   221   pottery,   ceramic,   slip,  molder workers in Lalejin,

   Hamadan, Iran. The results were  compared  with  respiratory capacities of 61     

   people in   Lalejin   that   occupy   to  business which are not exposed to any     

   particle of quartz.

     Statistical   tests  showed the mean amount of respiratory volume in pottery

   and ceramic workers with less than 20 years occupy, was not different  from

   the control group but in workers with more than 40 years old and more than

   20  years  occupy  to  ceramic and      pottery, VC, FVC, FEVwere different

   from  the  control  group. The  proportion  of   FEV/VC   is   lower  than 75%.

     Concentration of particles were measured in different workplaces ambient.

   The  results  showed   that    concentration of  dust  in  ceramic  and pottery

   workshops were more than slipper and molder  workshops.