Khem Laphasrada Chuaykua, born Rujira Chuaykua, is a Thai actress and model. She graduated from the Faculty of Accounting at Attawit Commercial College and has a Bachelor of Marketing from Sripatum University.

Khem entered a model contest in 1997 but was eliminated the first time. She then won the Miss Motor Show in 1998 and was contacted by Channel 3 producers. Her most notorious roles were in Saam Num Nuer Tong, Poo Chai Mur Song, Nang Barb, Bua Prim Nam, and Song Pradtana.