Using conversation analysis as its methodology and taking natural mundane interaction in Mandarin as its data, this study examines “justifying” the complainable as a response to third-party complaining. Three practices of justifying are identified out of data analyses, including canceling the deliberateness of the complainable, generalizing the complainable, and highlighting the bright side of the complainable. The complaint recipient’s reinterpreting the complainable through justification changes the complainer’s perception of the complainable, and helps the complainer step out of a negative state. Despite being a disaffiliative response, justifying the complainable to some extent contributes to maintaining the social solidarity among the participants.