Our  study  focused  on  the  evaluation  of  the  three  trace  elements:  lead,  cadmium  and  zinc,  a  common  bony  fish  in  the  western  Mediterranean  coast  of  Algeria,  Spotted  weever  (Trachinus  araneus,  Cuvier,  1829).  Sampling  took  place  over  a  period  of  three  months  from  February  to  April,  2013,  two  bodies  were  considered  representative  for  the  edible  part  man  and  gills  that  represent  the  filter  unit  muscle.  The  concentrations  of  the  metal   elements   were   determined   by   Atomic   Absorption   Spectrophotometry   The   flame   ,   according   to   three  parameters  (gender,  height  and  month)  and  levels  of  metal  accumulation  were  determined.  In  this  study,  the  results  reveal  that  the  Spotted  weever  (T.  araneus)  bioaccumulate  three  xenobiotics  sought;  the   higher   levels   are   those   of   zinc,   lead   to   higher   concentrations   in   the   lower   and   lower   concentrations   are  those  of  cadmium.  The  results  were  statistically  processed  demonstrated  no  significant  difference  between  the  levels  of  heavy  metals  in  both  sexes  in  muscle  tissue  against  significant  values  are  noted  in  the  gill  tissue.  The  study  reveals  that  the  accumulation  of  pollutants  is  higher  in  females  than  in  males.  Similarly,  it  is  clear  the  chemical   pressure   is   marked   in   younger   individuals.   Levels   of   concentrations   of   metallic   elements   reflect   a  certain  pollution  of  the  study  area  (Bay  of  Oran).  In  this  study,  trace  metals  recorded  in  the  flesh  of  the  living  spider  does  not  exceed  the  limit  of  the  Maximum  Allowable  Dose  (D.MA),  but  can  lead  to  serious  dysfunction  in  these  fish.