PURPOSE: An apparatus for depositing a thin film is provided to reduce maintenance costs by reducing the size of a target which is installed on the top of a chamber. CONSTITUTION: A window is installed on one side of a chamber so that a substrate can be loaded through the window. A chamber has an evaporation space of a cylindrical shape. A substrate transfer part(200) transfers the substrate to a first direction. A target part(300) evaporates a thin film on the moving substrate. A heater(400) heats the substrate in the chamber.
