A flow regime map for a two-dimensional spouted bed is constructed from the experimental conditions that cause the fixed bed, spouted bed, bubbling fluidized bed and slugging bed. The map is compared to the one that is made from the simulations using P-TAK, a general-purpose simulation code of gas and particle flow by the discrete element method. Both maps coincide very well, indicating that the discrete element method has big potential for predicting critical flow conditions such as the minimum spouting velocity or the maximum spoutable bed height.