Abstract: The kiln with displaceable frames, designed to contain also manufactured articles of considerable mass avoiding any direct contact between them and the motor rollers which causes thickenings, is provided with a formation of short transverse, non-through, rollers (22), distributed in two opposite rows to define at least one plate of transport, said rollers extending in an overhanging manner towards the inside of the lateral walls of the kiln; a loading frame (28), rectangular or square, constituted by a pair of stringers (29) connected rotationally to the internal ends of said rollers and interconnected by transverse elements (30) for supporting the manufactured articles to be treated, is introduced into the kiln and guided by lateral surfaces; the kiln is used in industries in which drying or firing of manufactured articles, for instance ceramic articles such as sanitary apparatus, is made.