Background: Skin cancer is one of the most common types of cancer. As farmers stay under sun for a long time and handle many different chemicals, they are at risk. This study was carried out to examine the effects of training for protection on their knowledge level and attitudes. Method: The subjects were 194 farmers living in a village in Marmara region which most benefits from the sun in Turkey. No sampling was performed. Data were collected before and after six months of training through a personal description form and skin cancer attitude-knowledge form and analyzed using percentage calculations, McNeamer test and t-test in dependent groups. Results: Knowledge level of farmers on skin cancer and the protection from skin cancer was significantly increased after the training (p<0.01) regarding use of sun cream, umbrellas, swimming and traditional behavior (p<.01) but not use of hats, sunglasses and long-sleeved shirts (p>0.01). A significant decrease was also determined in tampering with moles, acnes and scars (p<.01). Conclusion: The training given to farmers for protection against skin cancer was found effective for improving knowledge levels and attitudes. Planned and regular education should decrease the skin cancer rate among farmers.