We measured the scatterd radiation encountered in clinical warkes with posked chambers, filmbades, and a dosage rate meter under wariout conditions of irradiation, and presented the result of the study. These result may be summarized as fllows: 1.To know the quantity of scattered radiation to which each inbividual worker is highly important to the operators and effective in reducing such radiation quantity. 2.In handling the rdiation constant attention and action of the persons invalid to avoid receiving scattered radiation will markedly diminish the total scattered radiation quantity received by them regardless of whether protective screening is being used or not. 3.If installation of protective arrangements is complete protection of the radiation will be effected with far less efforts. 4.In fluoroscoping patients a pysician in charge should be able to limit the radiation quantity to which he is exposed by a litte but continuous caution.