In this study, effect of heat treatment on mechanical properties of JGC (Jute fiber reinforced Green Composite) were examined. PLA (Poly Lactic Acid) resin was used as matrix. Jute fiber cloth was used as reinforcement. Heat treatment and heat compression treatment on JGC laminates after molding were conducted. As a result, tensile strength of heat treated JGC increased about 24%. Tensile strength of heat compression treated JGC increased about 19%. Young's modulus of heat treated and heat compression treated JGC increased about 1% and 11% respectively. Tensile creep strain of heat treated and heat compression treated JGC decreased. Therefore, there is an effect of heat treatment and heat compression treatment to tensile strength, Young's modulus and creep strain for JGC.