Juyin juya halin Siamese na 1688 wani babban bore ne na jama'a a Masarautar Siamese Ayutthaya (Tailan ta zamani) wanda ya kai ga kifar da sarki Narai na Siamese mai goyon bayan Faransa.Phetracha, wanda a baya ɗaya daga cikin amintattun mashawarcin soja na Narai, ya yi amfani da rashin lafiyar Narai tsoho, kuma ya kashe magajin Narai Kirista, tare da wasu mishan da yawa da kuma babban ministan harkokin wajen Narai, ɗan ƙasar Girka Constantine Phaulkon.Daga nan sai Phetracha ya auri ‘yar Narai, ya hau karagar mulki, ya kuma bi manufar korar tasirin Faransa da sojojin kasar daga Siam.Daya daga cikin fitattun fadace-fadacen shi ne Siege na Bangkok na 1688, lokacin da dubun dubatar sojojin Siamese suka shafe watanni hudu suna yiwa wani katanga na Faransa kawanya a cikin birnin.Sakamakon juyin juya hali, Siam ya yanke muhimmiyar alaƙa da yammacin duniya, ban da Kamfanin Gabashin Indiya na Dutch, har zuwa karni na 19.