Diary (disambiguation)

Diary may refer to:
 * Diary, a song by KoERA K. featuring UNI.
 * Diary, a song by wintermute featuring featuring Hatsune Miku.
 * Diary-EpisodeⅡ-, a song by GOTS featuring Lily.
 * Diary, Diary, Diary, Blank, a song by HikkiiP featuring Kagamine Rin.