Leiomyoblastomas are radiologically and grossly indistinguishable from the leiomyoma or leiomyosarcoma. Tey tend to occur later in life, but attain the same size and shape and have the same sex attribution as the other smooth muscle tumors. The major difference is their histologic appearance. Leiomyoblastomas are composed primarily of rounded or polygonal cells with a clear space surrounding the nucleus instead of spindle cell mainly found in leiomyoma or leiomyosarcoma. Leiomyoblastomas are felt to have considerably more malignant potential than leiomyoma, but this has rarely been demonstrated. Exophytically growing tendency limits conventional barium studies. So recently CT is useful in depicting the origin, extend of these masses, and detection of distant metastasis. CT is an ideal imaging modality for study of this unusual neoplasm. We report a case of exophytic growing leiomyoblastoma from posterior wall of the stomach in 43 year old woman. We discussed with CT finding an reviewed the literature.