As part of the 2015 Cancer Barometer survey, French people were asked about their knowledge, beliefs, and preventive behaviors regarding the risks associated with ultraviolet exposure. These risks are a leading cause of skin cancer, sunburn, eye inflammation, and cataracts. Questions covered awareness of dangerous sun exposure times, the use of tanning beds or lamps, prevention attitudes among adults as well as parents regarding their children’s sun exposure, and those of workers exposed to the sun. For the first time, the Cancer Barometer also included questions regarding skin abnormalities (such as a new or changing mole) and concerns regarding melanoma screening, particularly the so-called "ABCDE" criteria (asymmetry, border, color, diameter, and evolution over time). Other questions (eye, skin, and hair color; photosensitivity during initial sun exposure; tendency to burn, get sunburned, or tan) were designed to determine the respondents’ phototype retrospectively (a skin type characterized by its color and sensitivity to the sun and classified from I to VI). This 46-page chapter details the main findings of the 2015 Cancer Barometer regarding the knowledge, beliefs, and practices of the French population regarding exposure to natural (sun) and artificial (tanning beds and lamps) ultraviolet radiation.