PURPOSE: To continuously manufacture compact surface timber by applying a thermoplastic resin to processed timber, and heat-compressing it in succession between a plurality of pairs of heat compression rolls and thus compact-curing the surface layer thereof.

CONSTITUTION: The roll distances of each pair of rolls 1W3 are set in the range of 80W95% of the thickness in accordance with each processed timber. One or the other of at least a pair of upper or lower rolls among the roll pairs 1W3 is heated not less than 150°C, and the processing speed is set within the range of 0.1m/min.W15.0m/min. The processed timber is previously applied with a thermoplastic resin in its surface and then forwarded to the pairs of heat compression rolls 1W3. The thermoplastic resin applied to the processed timber is heated by means of the pairs of the heat compression rolls so as to cure the surface thereof, and the compact surface timber compacted by the affection of a heat compression effect in its surface layer of the processed timber can be obtained continuously. Urea-formaldehyde resin, melamine resin, phenol resin, as well as, epoxy resin, unsaturated polyester resin, alkyd resin and urethane resin are given as thermoplastic resin.