Landscape analysis has been performed to assess the impacts of landuse conversion on landscape provisioning service for rice sufficiency in Langkat Regency, Indonesia. In this study, we used 30-m Landsat satellite images in 1989, 2001, and 2010to analyze a change of landuse. Afield survey was implemented to collect socio-economic data in order to examine the driving factor of the changes.. The results showed that forest was the dominant landuse type in 1989 and 2001, but it was converted into oil palm plantation in 2010. The rice land continuously decreased during the periods. Regarding to the analysis, forest and rice lands were fragmented into smaller patches from 1989 to 2001. Indeed, the availability of milled rice in Langkat Regency have decreased; from 328,913.90 ton in 1989 to 19,436.74 ton in 2010.