In today's world, many plastic foams, such as expandable polystyrene, extruded polystyrene, polyurethane, and styrene methyl methacrylate foams, have a wide range of applications. Most Foam foundries, large prototyping, and sculpture-related industries uses polystyrene foam because of its unique properties such as lightweight, thermal cutting, cheaper, and ease of availability. The Industries currently practices three methods for shaping polystyrene foam: hot wire cutting, foam molding, and foam machining. All of the shaping options have some restrictions when it comes to creating complicated foam objects, at some extent complex shapes can be realized using conventional method by manufacturing the complex shape in different parts and joining them with hot melt adhesives, this will increase the cost and lead time, Therefore these issues can be resolved by adopting Additive Manufacturing (AM) due to several advantages, such as ability to product complex shapes in one go, better accuracy, and waste minimization. A very little literature available on polystyrene foam AM. This article discusses the need, present state of art, future scope and potential applications of polystyrene foam additive manufacturing.