The invention relates to a shelf support for supporting a shelf plate and to an arrangement in a shelf. The shelf support comprises a support part arranged to be extending outside of the side wall aperture, a pin part arranged to be inserted into the side wall aperture and a stopping surface provided to the support part. The pin part protrudes from the stopping surface and the stopping surface is arranged to be placed against the side wall surface when the pin part is inserted into the side wall aperture. The pin part further extends from the stopping surface in a pin angle (X, Y) in relation to a direction (A) perpendicular to the stopping surface.