To provide a toilet unit for using the upper end as an armrest of a user, by lowering the upper end of a pipe construction space from a washstand.

A horizontally laying drain pipe for flowing waste water from the washstand fixed to a toilet room wall surface, is fixed along the toilet room wall surface for fixing the washstand, and a paper roller is arranged in a front space of this horizontally laying drain pipe. Thus, an upper surface of an installation space of the horizontally laying drain pipe can be arranged in a low position, and its upper surface can be used as the armrest.