Non-transporting disposable diapers (ND), moisture-transporting disposable diapers (MD), and diapers covered by wool flannel (WC) were tested for their moisture-transporting performance by cup method test and wearing test. Wearing test : Under ordinary clothes, the samples were worn for 2 hr. Humidities inside diapers ( H ) were measured at the front and the back in sitting and lying postures. The samples were weighed before and after the test to obtain weight change ( W ). The result is as follows : 1) The moisture transport ratios of water proof materials was 25 % for WC. 20 % for MD-sheet, and 0 % for ND-sheet. The difference between WC and MD wasn't significantly recognized. 2) In general the inside humidities at wearing of above diapers were increased in order to ND >MD >WC. The difference between WC and MD was significantly recognized. 3) The correlation between final H and W was : γ=0.79 (30 ± 1°C, 60 +5 % R.H.).