PROBLEM TO BE SOLVED: To provide a storage-type sluice with an extendable sliding handle that may be adjusted in a vertical direction by pulling up a sliding member inserted and fitted in a stop valve operation tube to a knee position higher than a levee surface, and then lifting the stop valve operation tube while holding a sliding handle of the sliding member.SOLUTION: In order to open/close a stop valve 9 for rice paddy management, a cap 8 of a storage box placed on a surface of a levee and others is opened and a box nut 11 in a storage box tube 7 is loosened, and then a sliding handle 18 is gripped to pull up a sliding member 15, to have an upper stopper 16 engaged with a lower stopper 14. When the sliding member 15 is lifted further, the sliding member moves up and down together with a stop valve operation tube 12, enabling opening/closing operation of the stop valve 9. After completing water volume adjustment for the rice paddy, the stop valve 9 is fixed by tightening the box nut 11 and fixing the stop valve operation tube 12. Then, the sliding member 15 is pushed into the stop valve operation tube 12 for storage, and finally the cap 8 of the storage box is closed.SELECTED DRAWING: Figure 1