Objective: The aim of this study is to determine the rickettsiae in ticks collected on human in çorum Province by using the Polymerase Chain Reaction (PCR). Methods: A total of 1010 tick samples which were collected on humans identified to species level in terms of the morphol. characters. Total DNA's individually extracted from ticks were screened for the presence of Spotted Fever Group rickettsiae using the PCR targeting rickettsial citrate synthase (gltA, 381 bp) and outer membrane protein (ompA, 532 bp) genes. Results: Out of 741 Hyalomma marginatum ticks collected from humans in çorum Province, 51 (6.88%) were infected Rickettsia aeschlimannii, 3 (0.4%) were infected Rickettsia sibirica mongolitimonae. Out of 32 Dermacentor marginatus ticks, 3 (9.4%) were infected Rickettsia raoultii and 3 (9.4%) were infected Rickettsia slovaca. In addition, rickettsial DNA was not found in Hyalomma aegyptium, Hyalomma excavatum, Hyalomma parva, Haemaphysalis punctata, Ixodes ricinus, Rhipicephalus bursa and Rhipicephalus turanicus ticks. Conclusion: In the present study, rickettsiae in ticks collected from çorum Province were examined for the first time. According to our results, 4 different rickettsiae, R. aeschlimannii, R. sibirica mongolitimonae, R. raoultii and R. slovaca were commonly found in these ticks. Therefore, it suggested that the healthcare staff working in this region should be careful against the possibiliy that tick-borne rickettsioses may develop in people infected by tick in çorum region.