PROBLEM TO BE SOLVED: To provide a covering material-guiding roller capable of making a long and heavy covering material easy for pulling up over a green house skeleton, and easy for passing the pulled up covering material through a space between the green house skeleton and a fixing rope, that is a next work. SOLUTION: This covering material-guiding roller 13 is provided by installing respective frames at the both end parts of the roller 1 in rear direction, installing a first engaging tool 7 of a lower opening protruding in lower direction at a first frame 5 at one side of the frames at a prescribed position, installing a second engaging tool 8 of the lower opening protruding in upper direction at a position installed with the roller 1 by almost horizontal direction on attaching to an inclined pipe of the green house skeleton by joining/fixing at a second frame 6 at the another side, and installing a third engaging tool 9 of the lower opening for a ridge pipe of the green house skeleton at a prescribed position. COPYRIGHT: (C)2006,JPO&NCIPI