This study was carried out from January 1992 to December 1993 in Sidodadi village of Padang Cermin Subdistrict of South Lampung Regency. The objective of the study is to confirm malaria vector in the study area. The potential vectors species of mangrove deforested coastal areas were caught indoors and outdoors by using night human-landing collection. One species i.e Anopheles sundaicus which was caught in October 1993 was infected with malaria parasites of both Plasmodium falciparum and P. vivax, as incriminated by enzyme-linked immunosorbent assays (ELISAs) done on mosquito. In that month, the sporozoite rate was 1.4% and the man biting rate (MBR) was 47.8 mosquitos/night-person. The transmission level was very high with an inoculation rate of 66.9% or every two days. This vector species was found throughout the year with a peak abundance in September to December. There is no correlation between the rainy season and the seasonal population density (r = - 0,37).