A transparent solid soap or transparent soap material which comprises mainly of a salt of the fatty acid, is obtained by saponifying fatty acid or animal/vegetable oil with alkali, wherein 1) the alkali is sodium hydroxide and organic amine, and a molar ratio of sodium hydroxide to organic amine is from 1:0.8 to 1:2, and 2) a quantity of the alkali is 2 to 3 saponifying equivalents to the fatty acid or the animal/vegetable oil. The transparent solid soap and the transparent soap material according to the present invention can be easily produced without requiring a fine control of moisture content, and a maturing period till reduction in weight is settled, and, besides, good in stabilities of transparency and of weight with a passage of time.