Background- Cancer and its treatment may result in physical and mental impairment because ofrnthis cancer survivor increasing attention has been given to improving functional recovery that isrnoncology rehabilitation. Rehabilitation is the key of functional recovery. In Ethiopia, in 2010rnthere were greater than 2,000 adult and 200 pediatrics cancer patients annually but in 2013/2014rnthe estimated number of cancer patients was 2040 monthly from available patient record.rnObjective â€“ To assess the oncology rehabilitation service utilization and its determinants amongrncancer patients at cancer center of Black Lion General specialized Hospital.rnMethods- Across sectional quantitative study was conducted for 423 cancer patients comes forrntreatment to the cancer center during the study period. All patients greater than 18 years old andrnmentally well were included in the study and the data was processed and analyzed by using EPIrndata (version 3.1) and SPSS (version 16.0) soft ware. Result - Out of the participants of thisrnstudy (388) 26% of respondents were involved at least once in rehabilitation service. The leadingrntypes of cancer at cancer center breast cancer (25%) and followed by colorectal cancer (20.6%)rnand cervical cancer (14.7%). Main rehabilitation services given were nutritional andrnpsychological support. Unavailability, lack of professionals and cost among the barriersrnConclusion and recommendation majority of patients have not gained comprehensivernappropriate rehabilitation services so that increase the knowledge of the professionals andrncomprehensive programs are neededrnKeywords- Cancer rehabilitation, Oncology service Utilization, barriers of rehabilitation servicernutilization