Leng Ouch(an haife shi a shekarar 1975) dan gwagwarmayar yanayi ne na Kambodiya. Ya kasance yarintarsa ​​a cikin dazuzzuka a Kambodiya kuma ya zama mai gwagwarmaya game da sare bishiyoyi ba bisa doka ba a dazukan Kambodiya. An fi saninsa da yin ɓoye don yin rikodin ayyukan sare bishiyoyi a cikin ƙasarsa. Leng Ouch ya shafe mafi yawan yarintarsa ​​a cikin tsarin mulkin Khmer Rouge. Ya kasance a farkon rayuwarsa yana ɓuya a cikin dajin Kambodiya kawai ya fara karatunsa bayan dangin sun ƙaura zuwa Phnom Penh a shekara ta 1980. Ya yi aiki don karatunsa kuma ya sami tallafin karatun lauya wanda ya ba shi damar shiga cikin kungiyoyin kare hakkin bil'adama da yawa ya fara aikinsa a matsayin mai gwagwarmaya. Leng Ouch ya kafa kungiyar Kare Hakkin Dan Adam ta Kambodiya (CHRTF) wata kungiya don yaki da sare dazuka a Kambodiya. A lokacin shekarun 2000 zuwa 2010 Leng ya shiga cikin sirri a cikin yanayi mai hatsari sau da yawa ɗaukar hotuna da yin rikodin shaidar ɓarkewar doka ba wanda ya haifar da soke filaye 23 na ƙasa da kuma fallasa babbar gasa.