Abstract: A portable-type simplified toilet comprises a foldable main body of a cylinder shape formed by butting end-to-end portions of a corrugated board cut in a band-like shape and then adhering the butted ends to each other in an overlapped state, the main body having engaging window holes bored in lower portions of a peripheral wall of the main body so as to be positioned at equal distances from an imaginary line in the longitudinal direction of the main body, and a bottom board separately made of a corrugated board and having a fold line extending in the longitudinal direction and engaging projection pieces projecting from the peripheral edge so as to be positioned at equal distances from the fold line, the engaging projection pieces being inserted into the engaging window holes.