To provide a toilet device which can secure dirt transfer performance in a sewer pipe with reliability even when the amount of usage of dirt discharging water and washing water is reduced and provide an ultra-water-frugal toilet device which can reduce the amount of usage of dirt discharging water and washing water further.

The toilet device has a toilet part having a toilet bowl part 1, a discharge part 2 having a siphon trap structure from the bottom face of the toilet bowl part, and a water-supply part 3 supplying discharge flushing water to the toilet bowl part, and a storage part having a semi-enclosed reservoir chamber 4 located below the toilet part, formed continuously to the discharge part, having an air hole part 41 with deodorant function above the same, and capable of attaining the siphon action of the toilet part, and a discharge siphon part 5 opening in the vicinity of the bottom face in the storing chamber and carrying out discharge action when flowing object to be discharged of predetermined quantity or more is accumulated in the storing chamber. Thus, the toilet device is provided with sufficient dirt transfer performance in the sewer pipe even when the discharge of dirt from the toilet bowl part and washing by small amount of water are performed.