Molar pregnancy presents a pathologic condition requiring surgery of the uterus promptly as possible althoughhydatidiform mole itself is a benign disease. In order to remove the mole as quickely as possible, early diagnosisis desirable. In actural practice however, definite preoperative diagnosis by clinical manifestation isimposssible since which is vague or altogether absent symptoms especially in first trimester. Hysterography bytransabdominal injection is very valuable and easy procedure for accurate diagnosis of hydatidiform mole whichshows typical honey combed, moth eaten or sponge pattern on roentgenography. We have experienced 68 cases ofhydatiform mole during last five and half years. Among them hysterography by transabdominal route was done on 26cases and shows 96% diagnostic accuracy. One missed case was turned out to be missed abortion. The absence ofaccidents indicates the harmlessness of this method. We feel the best approach in making diagnosis of hyatidiformmole among clinically borderline and in conclusive for mole pregnancy and its differential diagnosis is by use oftransabdominal hysterography.