Abstract: Blood trace elements, calcium, magnesium, iron, manganese zinc and copper were measured in 34 case of stomach cancer end ecual number controls(non cancer). Results show that level of blood calicium and iron in patients with stomach cancer are evidently higher than that in patients with no cancer, but level of blood manganesium in patients with stomach cancer is lower than that in patients with no cacer. It indicated thst higher blood calcium iron and lower manganese were associated with stomach cancer closely.