The invention relates to a gas exchange valve with a hollow space, for an internal combustion engine. The valve comprises a valve stem (3), a valve base and a valve disk (2). The valve stem and valve disk or valve stem and valve base have an approximately cylindrical, elongated hollow space which is formed by both parts. The space is sealed by welding. The aim of the invention is to improve the quality of the welding. To this end, an extra mass of the material required for sealing the hollow space is provided on the valve disk or the valve base so that no additional welding material is necessary.