This study investigated the relationship between job crafting (cognitive crafting, task crafting, and relational crafting), informal learning, innovative behavior, and the moderating effect of the perceived error management climate. This research used data from 316 Korean employees of a large firm. While cognitive crafting did not directly affect innovative behavior, we found statistically positive effects on task and relational crafting. Informal learning mediated the relationship between cognitive, task, relational crafting, and innovative behavior, while the perceived error management climate moderated the relationship between cognitive crafting and informal learning. This study provides practical and theoretical implications based on the results.