Öz Fungi are important pest groups causing important economic losses in protected vegetable areas. There are important lacks in both growing technique and greenhouse conditions in central Anatolia provinces. Vegetables grown in greenhouses are affected by the fungal pathogens that cause economic losses. Ror that, a study has been performed in 2003-2004 in Ankara, Çankırı, Zonguldak and Bartın provinces to detect the fungal pathogens and their prevelance in seedling, flower and fruit stages of the plant. At the end, root rot Fusarium oxysporum Snyder & Hansen and Rhizoctonia solani (Kühn); leaf mold [Cladosporium fulvum Cooke., (Fulvia fulva)], early blight [Alternaria solani (Ell. and G. Martin) Sar.], gray mold (Botrytis cinerea F.), late blight (Phytophthora infestans Mont. de Bary.); Phytophthora root rot (Phytophthora capsici Leon.); are downy mildew [Pseudoperonospora cubensis (Berk. Curt.) Rustow], gray mold (Botrytis cinerea F.), Fusarium wilt (Fusarium oxysporum f.sp. cucumerinum); are root rot [Fusarium oxysporum Snyder & Hansen and Rhizoctonia solani (Kühn)], gray mold (Botrytis cinerea F.) in bean; are powdery mildew [Leveillula taurica (Lev.) Arnaud] in eggplants are detected under protected conditions.