Abstract: The invention relates to an ergonomic pillow consisting of a body with a modular profile based on two cylindrical side sections and an intermediate prism-shaped section that is substantially smaller in height. The elasticity characteristics of the pillow are such that, when the user rests his/her head thereon in any position, equal pressure is applied over the entire contact surface. The inventive pillow can have a modular structure based on two basic elements, namely a half-pillow and a laminar section, the number and shape of which can be selected according to the desired elasticity and height.