The purpose of this study was to examine whether palatography can be used for the diagnosis in dysphagic patients who experience difficulty of bolus formation and bolus transport into the pharynx. Four dysphagic patients with difficulty at the preparatory and oral stage of deglutition were selected, another five dentulous students with normal feeding, swallowing and stomatognathic function were chosen as subjects. Using palatal plate (black vinyl chloride seat) in powdery method, palatograms of the syllables and saliva swallowing were recorded. The syllables [ta], [na], [ra] and [ki] were selected which have been used for dysphagic patients to train the articulation. Palatograms to pronounce the syllables [ta] and [na] were used to examine the ability of bolus formation by the anterior part and the lateral margin of the tongue; the syllable [ra] was used to examine the ability of bolus formation by the apex of the tongue; and the syllable [ki] was used to examine the ability to transport the bolus into the pharynx by the elevation of the posterior part of the tongue. Palatogram of swallowing was used to examine the ability to transport the bolus into the pharynx by the elevation of the dorsum of the tongue. The results were as follows;1. In subjects from whom the disorders of bolus formation was admitted, abnormalities were not found in palatogram to pronounce the syllables [ta] and [na] . Therefore, in this study, it was indicated that the disorders of the bolus formation might not be caused by the anterior part and lateral margin of the tongue.2. In subjects from whom the disorders of bolus formation was admitted, abnormalities were found in palatogram to pronounce the syllable [ra] . Therefore, it was indicated that the apex of the tongue was responsible for the disorders of bolus formation.3. In subjects from whom choke was admitted, abnormalities were found in palatogram to pronounce the syllable [ki] and saliva swallowing. Therefore, it was indicated that the decreased ability to elevate the tongue was responsible for the choke.From these results, the possibility to diagnose the disorders of bolus formation and the difficulty to transport the bolus into the pharynx of dysphagic patients by palatogram was indicated through these subjects.