TOP-RAILED SLIDING DOOR GUIDE DEVICE

PROBLEM TO BE SOLVED: To provide a top-railed sliding door guide device capable of being firmly mounted even on a floor where a hole for housing a top-railed sliding door guide device body is difficult to form with a high degree of accuracy.SOLUTION: A top-railed sliding door guide device 1 includes: a case 14 for being housed in a storage hole 5 formed in a floor 4; an ascending/descending body 11 which is provided so it can be adjusted up/down with respect to the case and which guides a top-railed sliding door 2 by having its leading end inserted into a guide groove 3 formed on a lower end surface of the top-railed sliding door 2; and a flange member 20 which is fixed to the floor in such a manner as to hold a peripheral edge part 17 of an upper end of the case from above and cover the storage hole.