Study on parasitoid and their parasitism in Gunung Halimun National Park rice field in different seasons was conducted during January to December 2001. Parasitoids were collected from a range of host using transect method. Total species, individual abundance, diversity index and parasitoid and host evenness in the west seasons were higher than those in dry seasons. Pangguyangan (700 m above sea level) has higher and more diverse parasitoid and their hosts than those in Cisarua (620 m above sea level). Parasitoid diversity index in Legok was higher than that in Pangguyangan, although more diverse of hosts in Pangguyangan were observed. Parasitoid and host diversity index were similar in defferent time, although they tend to increase linearly with the rice growth. Parasitism rate in wet season tend to be higher than that in dry season. Generally, Legok showed higher rate of parasitism compared to others. These result suggest that parasitoid diversity and parasitism is depend on many factors, those are, lovation, season, host feeding noche and host diversity.