Design, construction and evaluation of fully automatic tomato transplanter were the main aim of this study. The designed machine include a main chassis, transfer mechanism of seedling trays to pick up armposition, the seedling pick up arm mechanism of the tray, crash tube, furrower and control system. The actuators include pneumatic cylinders and PLC controller was used to control system. A step mechanism gradually guides the tray to the left, right and down sides so that pick up arm will be able to penetra