Temporomandibular disorder (TMD) is a collective term for a number of pathologic conditions of the masticatory system. Sign and symptom of TMD most commonly pronounced between the ages in 20-40. This research aimed to find out the description of temporomandiblar disorder in the student of dentistry Muhammadiyah University of Yogyakarta. This research is a non experimental/observational/descriptive survey and was designed using cross sectional. The data were analyzed using descriptive methode.. Samples has been taken as many as 88 people with inclusion criteria by purposive sampling technique. The data was obtained by clinical examination based Dysfunction index, each sample was being examined measured Range of motion (ROM) with a sliding caliper, the sound of the joints was examined using fingers, palpation of the masticatory muscles, palpation of the lateral and posterior parts of the joints, and jaw was opening movement toward left and right. The result of this research shows that from 88 respondents as many as 63.63% are girls and 36.37% are boys with the distribution of age 18-23 years old, 82.77% of them have 1 or even more bad habbit. From anamnesis examination as many as 50% felt mild symptom and 17.05% felt severe symptom. From clinical examination as many as 77.27% was experiencing mild TMD and 13.64% was experiencing moderate TMD. Based on the research has been conducted could be concluded that 67.05% of student of dentistry UMY felt the symptom of TMD and 90.91% was experiencing TMD by Anamnestic index and Dysfunction index. The most common pronounced sign and symptom is joint sound.