Two hundred fecal samples were randomly collected from various aged broiler flocks farms, which suffered from diarrhea or respiratory problem or both in Tartous and Latakia Provinces of Syria. This study demonstrated the infection of the broiler flocks with Cryptosporidium in Tartous Province of Syria with a rate of 5.6% only. The results of tests based on morphology and size of Cryptosporidium oocysts showed that the parasite is probably C. baileyi which ranged in size about (6 μm X 4.5 μm).