To obtain a portable toilet easily usable without the feel of discomfort in use.

The portable toilet 1 is a cylindrical bag body 3 having an aperture 2 atop the bag body, in which the bag body 3 is formed of a polyethylene (PE) film and is vertically installed with a cylindrical nonreturn piece 4 made of the PE film from the inner peripheral edge of the aperture down to the approximately intermediate area of the inner flank of the cylindrical bag body and in addition, the lower part of the non-return piece 4 is opened with a through-hole 7; further hardening agents 5, 5, etc., for excrement, etc., are housed into the inside bottom area of the bag body 3. The outer flank of the aperture 2 of the bag body 3 is encircled by a pliable urethane piece 6. The urethane piece 6 is formed to be made two-foldable at its opposite right and left edges.