PROBLEM TO BE SOLVED: To provide a washing device for unprocessed timber having the following features: it is required no driving power it has a simple structure and is cheap and dirt on surface of an unprocessed timber is efficiently removed with a simple work.SOLUTION: The washing device for unprocessed timber comprises: a roller conveyor 14 on which an unprocessed timber 12 is loaded and manually transported in axis direction and a washing chamber 20 which is arranged in the middle position of the roller conveyor 14 in traveling direction and covering a part of the roller conveyor 14. An annular pipe 42 is arranged in a manner where: it is arranged on inside of the washing chamber 20 it is arranged on a virtual surface crossing traveling direction of the roller conveyor 14 and it surrounds the traveling direction center of the roller conveyor 14. A holding member 54 is arranged in a manner where: it is arranged near the pipe 42 it crosses traveling direction of the roller conveyor 14 a section facing center of ring shape made of the pipe 42 is arranged in a low position at a height almost the same as that where the roller conveyor 14 is arranged and the unprocessed timber 12 is positioned on the low position. The pipe 42 comprises a plurality of nozzles 44 from which washing solution is jetted out to center of the ring shape made of the pipe 42.COPYRIGHT: (C)2014,JPO&INPIT【課題】動力が不要で、簡単な構造で安価であり、簡易な作業で原木の表面の汚れを効率よく除去することができる原木洗浄装置を提供する。【解決手段】原木12を載せてその軸方向に手動で移動させるローラコンベア14と、ローラコンベア14の走行方向の途中に設けられ、ローラコンベア14の一部を覆う洗浄チャンバー20を備える。洗浄チャンバー20の内側に設けられ、ローラコンベア14の走行方向に対して交差する仮想面に設けられ、ローラコンベア14の走行方向中心を一周するように環状のパイプ42を備える。パイプ42の近傍にローラコンベア14の走行方向に交差して設けられローラコンベア14とほぼ同じ高さでパイプ42の環状の中心に対向する部分が低く形成され、この低い部分に原木12が位置決めされる保持部材54を有する。パイプ42は、パイプ42の環状の中心に向かって洗浄液を噴射する複数個のノズル44を備える。【選択図】図1