: Stilling Basins are the structures designed to contain hydraulic jump. In the present study, hydraulic jumps on a horizontal bed at the downstream end of an ogee weir with different shapes of continuous sill are investigated. The aim of this study is to find the effect of sill shape on energy dissipation, cavitation and sequent depth. For this purpose the downstream sloped sill, upstream sloped sill and vertical sill are investigated. The analysis of results shows: 1- The sequent depth of hydraulic jump does not depend on the selected sill shapes. 2- The upstreamthe sloped sill increases the jump length and is not suitable for the stilling basins. 3- The dissipated energy is almost similar for the selected sill shapes. When the sequent depth of the jump is not high enough, the upstream sloped sill shoots the supercritical jet and consequently, in this case the energy losses increase. This kind of flow is not acceptable for the stilling basins. 4- The upstream sloped sill causes separation of the stream lines from the channel bed. The separation increases the cavitations on the sill body. The upstream sloped sill is more effective at the end of the stilling basin (end sill) and also for dissipating energy the downstream sloped sill is used at the toe of the ogee weir. Finally an empirical equation is obtained for calculating the sequent depth.