To increase the effective usability of a plottage, and to improve operation performance of a business.

First to third tennis courts 1A, 1B and 1C complying with a regular specification, and a fourth tennis court 1D of which the lateral width is set to be approximately 1/3 to 1/2 of the regular specification size are set indoor by arranging them in the lateral direction in order for the indoor tennis school facility. Intervals a, b and c between the individual courts are each set in a manner to become narrower from the first to fourth tennis courts. Participants are classified into starters, beginners, intermediate players, and skilled players, and the fourth tennis court is used for instructing the starters, the third tennis court is used for instructing the beginners, the second tennis court is used for instructing the intermediate players, and the first tennis court is used for instructing the skilled players. Respective courts can be partitioned by first partitioning nets 3a, 3b and 3c which are hung from an indoor ceiling section 2 as well.