Even though the prevalence of toxoplasmosis is high in some areas of Indonesia, data on the disease is very limited. In this report, result of a study done in abattoirs from July 9 to October 22, 1971 will be presented. It was a study covering 50 samples of pigs done in Surabaya and Malang. Speciment preparation was conducted by digestion using 0.5% trypsin. Out of 50 samples there were 20 samples identified as positive, i.e. containing Toxoplasma gondii.