A bed fastening device providing connection of the components in a bed structure, including a first mating part and a second mating part correspondingly mounted proximally to one end of bed components. The first mating part includes an elongate parallelepipedal plastic item with equidistantly spaced planar partition walls extending into side housings of tubular members, openings being provided in between sequential partition walls and side housings. The second mating part includes an elongate planar base plastic item with perpendicularly oriented, equidistantly spaced tubular members provided with side extensions. Engagement of the mating parts and of the bed fastening device and accordingly of bed components takes place with the introduction of tubular members of the mating parts within the openings of mating parts and the vertical downward displacement of the mating parts.