Oral health is important for everyone, including special needs children. Unfortunately, special needs children have poorer oral hygiene than normal children. It may caused by low motoric and cognitive ability, lack of care and promotive program, type and severity of disability, oral habit, social economic, and mechanical drugs. The aim of this study is to understand the difference of OHI-S score among deaf and dumb, mild mentally disabled, moderate mentally disabled, physically impairment, and cerebral palsy. The method of this study is cross sectional and sample calculation using probability cluster sampling. Study sample comprised of 24 deaf and dumb, 23 mild mentally disabled, 20 moderate mentally disabled, 10 physically impairment, and 16 cerebral palsy. The oral hygiene status were assessed using oral hygiene index-simplified (OHI-S). data was analyzed using one way Anova test. One way Anova test revealed a significant (p<0,05) means there was a significant difference oh OHI-S among deaf and dumb, mild mentally disabled, moderate mentally disabled, physically impairment, and cerebral palsy at SLB 1 Bantul. Deaf and dumb has best oral hygiene followed by physically impairment. The poorer oral hygiene is cerebral palsy, followed by moderate mentally disabled and mild mentally disabled.