This investigation was carried out in a plastic house (350 m² area) located at Tishreen University in two seasons 2007-2008 and 2008-2009, to study the effect of soil solarization in soil borne fungi in greenhouse. With four treatments: the control treatment, Soilsolarization: 30, 40, and 50 days, and 0, 5, 10, 15 and 20 cm depth. The solarized soil covered with transparent polyethylene.