Thermoforming is one of many method to forming plastic sheet using heat and pressure for forming process. Vacuum Forming Machine is a machine that use thermoforming method in forming a plastic sheet. Vacuum forming is a thermoforming method which use vacuum pressure to form the plastic. Vacuum forming machine has high flexibility to produce plastic sheet to various kind of form as the user desired. This research is about Vacuum Forming Machine design with thermoforming method which suitable for UKM. The design process followed by specification determining, system designing and components selecting. Vacuum Forming Machine working by placing plastic sheet into clamp and then move it to heater until the plastic reach glass transition temperature.the clamp will bring the plastic sheet over the mold and cover the mold. The trapped air between plastic sheet and mold will be sucked by vacuum pump below the mold so the plastic sheet form will follow the mold. Formed Plastic sheet can be unload from the clamp and then will be trimmed to get desired part. The mold in this machine can be replaced easily depends on user.