Abstract: A posturally supportive toilet seat apparatus 1 comprising a seat 10 having a base portion 11. The base portion has leg support features 12 and an aperture 13 formed therein for passage of waste therethrough. The apparatus 10 further comprises a back support 14 which extends from a rear end of the base portion 11. The back support 14 and leg support features 12 are shaped, dimensioned, and, in an in use-configuration, adjustable/positionable relative to each other in an oblique relationship. In the in-use configuration, the thighs and torso of a user seated on the seat 10 are encouraged to form an acute interior angle therebetween, with knees locatable above hips, essentially resulting in the user adopting a squat position.