Chemotherapy as a treatment method of cancers, affects different parts of the oral cavity such as oral mucosa, teeth and salivary glands caused by salivary glands dysfunction during chemotherapy.Oral status of patients under chemotherapy will be affected by consumption of the drugs and their side effects such as reduction of the saliva, dryness of the oral cavity, changes in bacterial balance, oral mucosa damage, bleeding due to irritation of the tissues, xerostomia, dental caries, burning sensation, dysgeusia and dysphagia. No effective preventive protocol has been presented for oral care during chemotherapy.