We developed a rapid method for crop load adjustment on the basis of the leaf area index (LAI) from a case study of 18 open cultivated table grape cultivars for two successive years. Quadratic regression was significant at p < 0.01 for the relationship between horizontally projected LAI (PLAI) and LAI for 40 to 50 days after full bloom, resulting in the rapid estimation of LAI by the measurement of PLAI. Parameters of LAI per canopy area, canopy area, presumed bunch weight and crop load per leaf area (red-skinned cultivar, 0.6 to 0.8 kg・m −2 < black-and violet-skinned cultivar, 0.8 to 0.9 kg・m −2 < white-skinned cultivar, 1.0 to 1.1 kg・m −2 ) were used and formulated to estimate crop load per canopy area. All cultivars showed higher market preferences by crop loading on the basis of LAI from the field trial.Key Words:canopy area, fruit quality, leaf area