We performed sinus bone graft using small amount of autogenous bone, Orthoblast？？ II and BioOss？？ and covered the sinus window with Ossix？？ membrane in these case series. After 4.5 to 6 months after operation, histopathologic examinations of trephine core biopsy showed following results. 1. There was bone density of 43 to 87% and we could observe the favorable early new bone formation. 2. Active bony remodeling of woven and lamellar bone was observed during 4.5 to 6 months healing period.