PROBLEM TO BE SOLVED: To provide a skin wrinkle formation preventing and improving agent having an effect to prevent and improve formation of wrinkles made in the skin by ultraviolet.SOLUTION: A skin wrinkle formation preventing and improving agent comprises Red Ganoderma lucidum extract and/or Black Ganoderma lucidum extract which are extracted with carbon dioxide in the state of temperature range of 15-150°C and pressure range of 1-80 MPa. By utilizing Red Ganoderma lucidum extract and Black Ganoderma lucidum extract which are extracted with carbon dioxide, decrease of collagen production by ultraviolet in dermal fibroblasts is inhibited, and skin wrinkle formation due to ultraviolet can be prevented and improved.