Radiation exposure dose for patients during brain CT scan with General Electric C.T./T.8800 was measured using CaF2:Mn thermoluminescant dosimeter chips. The skin dose in single slice scan was 1.26$pm$0.10 rad, and that in 9 slice scan was 2.06$pm$0.16 rad So the ratio was 1.63. The surface dose in profile along axial distance in multiple slice scan was 0.27$pm$0.05 rad, too small to induce any pathologic condition. As noted from the above data, the radiation exposure dose during CT scanning is not high compared with other radiologic examinations.