To provide a phosphatidylcholine transdermal absorption preparation containing phosphatidylcholine in an adhesive layer. A phosphatidylcholine transdermal absorption preparation has a configuration in which an adhesive layer formed on at least one side of a support contains phosphatidylcholine, an adhesive component, and a lipophilic component, and thus the preparation becomes a patch-type transdermal absorption preparation which acts as a fat-decreasing agent which contains phosphatidylcholine and can exert an effect that local obesity such as subcutaneous fat is dissolved and fat is decreased by transdermal absorption of phosphatidylcholine as the preparation is pasted to the skin of a human body since phosphatidylcholine can be stably present in the adhesive layer and has an advantage due to the patch dosage form that the preparation can be fixed to the affected area and is more favorably handled as compared to liquid preparations and the like.
