The local flow structure in a slot-rectangular spouted bed column of 300 mm x 100 mm cross-section was investigated with slots of equal area but different length-to-width ratios. Dead-zones, spout shapes, and distributions of pressure, particle velocity, and voidage were explored. The local flow structure of the slot-rectangular spouted bed became similar to conventional spouted beds as the height increased, with spouts from slots of different length-to-width ratios approaching similarity in the upper part of the bed. Static bed height was found to have little influence on the flow in the spout at a given level.