A meta-analysis of 19 studies was conducted to compare the abilities among students with and without learning disabilities. The overall weighted mean effect size between students with and without learning disabilities was -1.16, a large effect size. Besides, the weighted mean effect sizes obtained for those five abilities including listening, speaking, reading, writing and mathematics were ranged from -.56 to -1.71. 'Ability types' and 'elementary versus junior high students' were found to be significant moderators on the overall abilities. 'Measurement types' were found to be the significant moderators on the speaking and writing abilities. 'Elementary versus junior high students' was found to be the significant moderator on the reading abilities.