Infections by soil-transmitted helminths is still a public health problem in Indonesia. Ascaris lumbricoides, Trichuris trichiura and the hookworms- mainly Necator americanus- were the most encountered. The rural villages near Yogyakarta in Central Java, Indonesia, were studied for the endemicity of the worms. The population in the two villages were around 1200 people and regarded the same in respect of low socio-economic level and low educational level. However, different occupations were applied in the villages. In the villages of Kasongan the main occupation was working in home industries making clay handicrafts such as ceramics and potteries, with bare hands. The materials were clay and sand, obtained from the soil surrounding the houses and from the riverbanks nearby. Environmental sanitation was very poor : most of the people had no latrines, defecation occurred in the field or in the vicinity of the river. The climate was hot and humid. The village of Godehan was inhabited mosdy by farmers, who also raised fish in open fishponds in the gardens or in the ricefields. Most of the houses did not have a latrine and defecation occurred in the fishponds or in the surroundings of the river. Faecel examinations were done by Kato's thick smear and modified Harada Mori culture technique. Soil samples were also taken from the several places and examined for A. lumbricoides eggs. The prevalence rates of the sod transmitted helminths in Kasongan village were significantly higher than those in Godehan village. A. lumbricoides infections were 50.8% and 11.5%; T. trichiura infection were 82.6% and 36.6% and N. americanus infections were 76.5% and 25.3%, in Kasongan and Godehan respectitively. Sod samples were found positive for A. lumbricoides eggs in 28.3% of 538 soil samples in Kasongan and in 2.7% of 183 samples in Godehan. The results indicated, that perhaps occupation was a factor for the significant differences in endemicity in the two villages.