A stool collector adapted for being positioned in a use position in which it is secured to a standard water closet or toilet to collect a stool sample delivered by a user, said stool collector comprising a rear piece adapted for being secured between rear halves of a toilet bowl and a tip-up toilet seat, respectively, of said toilet. The stool collector further comprises a front piece adapted for being secured between front halves of said toilet bowl and said tip-up toilet seat, respectively, said front piece comprising two lateral wings enclosing a cut-out adapted to allow for urine from said user to pass through into said toilet bowl in said use position, and an intermediate piece connecting said front and rear pieces and in said use position forming a stool collecting area adapted to receive said stool sample, said front, rear and intermediate pieces being manufactured from a flexible, foldable, biodegradable and highly water soluble paper material, said stool collector thus being suitable for being flushed in a standard water closet.
