Che with diaeresis (ô õ; italics: <span style="font-family: times, Times New Roman, serif; font-size: larger">ô õ</span>) is a letter of the Cyrillic script. Its form is derived from the Cyrillic letter Che (ç à<span style="font-family: times, Times New Roman, serif; font-size: larger">ç ÃÂ</span>).
Che with diaeresis is used only in the alphabet of the Udmurt language, where it represents the voiceless palato-alveolar affricate , like the pronunciation of in "chicken". It is the thirtieth letter of this alphabet.