Temporomandibular joint (TMJ) has a very important role in the function of mastication, swallowing and talking. During the process of chewing, this joint sustains a large amount of stress. Some complex excessive pressure on the joints can cause structural damage to the joints or interfere with the normal function of the relationship between condyle, discus and eminence that will result in pain and dysfunction. This study aimed to determine the frequency representation of TMJ dysfunction in 6-13 years-old children. Descriptive study was conducted by survey on students of SDN 2 Sengkang-Wajo totaling 297 children, consisting of 157 males and 140 females. The sampling using a stratified random sampling, by means of sub-populations forming a relatively homogeneous state of the variables. Results showed that the frequency of TMJ dysfunction with symptoms of pain in the supporting muscles TMJ was higher (87.34%) compared to other symptoms, followed by symptoms of mouth opening limitation (62.02%), clicking (43.03%), deflection (21.51%), mouth opening deviation (16.45%), and crepitation (5.06%). Based on the prevalence, many students of SDN 2 Sengkang suffering from dysfunction TMJ with a variety of symptoms due to low levels of dental and oral hygiene due to lack UKGS in school.