Helicobacter pylori is considered as a cause of human gastritis, peptic ulcer and gastric adenocarcinoma. The mechanisms of transmission are poorly understood, but based on isolation of H. pylori in cats, potential zoonotic role of them obviously are increased. The aims of this study were to determine the prevalence of feline gastric helicobacters and compare the prevalence of gastric helicobacter infection in pet vs. stray cats with main human strain, H. pylori. Thirty adult stray and 27 pet cats from different locations of Tehran province were isolated and their gastric samples underwent cytology, rapid urease test and genus/species specific PCRs. According to16srRNA PCR assay, total prevalence of Helicobacter infection was 100% and 56.7% in domestic and stray cats respectively. Cats were frequently colonized by Candidatus H. heilmannii and H. felis. H. pylori was not detected in any domestic or stray cats but based on some reports of human gastric lesions by H. Heilmannii and H. felis cats still can have some potential zoonotic role in transmission of the disease.