This study is entitled "declarative sentence pattern in 'Laskar Pelangi' and 'The Rainbow Troops': A Translation Study of Indonesian to English". In this study, the present writer discusses about the differences & similarities of declarative sentence between Indonesian novel and English translation novel. Further, the data were taken from Indonesian's novel ("Laskar Pelangi") as the source language and English translation Novel ("The Rainbow Troops") as the Target language. In this study, the present writer employs Descriptive Analysis as the methodology and analyzes Indonesian and English declarative sentence, which is categorized into nominal, adjectival, prepositional, and numeral, transitive and intransitive. Then the writer applies Contrastive Analysis method to contrast the patterns. Finally, the present writer concludes that the similarities of declarative sentence patterns between Indonesian and English language found in two categories, those are transitive, and intransitive; however the differences ones found in the nominal, adjectival, prepositional, and numeral category.