In this piece of furniture, which is taller than a normal chair, the seat as such is located at a such height as to allow the user to rest the user's feet on the floor or on a footrest and is constituted by a body that is differentiated at the top by a rear seat portion for the user's buttocks and a higher front portion that, inserted between the user's thighs, allows the user to sit astride it, this front portion being differentiated, lengthwise down the centre, into two parallel portions that, being mirror images, are spaced apart to define therebetween an open space located in correspondence with the user's genital area.