To esimate the bone marrow involvment of leckemia, we performed sciutigraphies using 99mTc antimony sulfide colloid and gallum-67 and compared with bone marrow aspiration biopsy and clinicolaboratory datas. 99mTc Antimony scan showed localized defect in 4 patients who had relapse. No false positive or negative results were observed. Gallium 67 showed localized increased uptake in 2 of 4 relapsed patients. Therefore, bone marrow scan is useful for the evaluation of marrow infiltration in jeukemic patients.