A protective goggle assembly has a goggle frame having a rigid goggle body formed on a front side. The goggle body has recesses formed on two sides of a lower end so that a resilient face engaging portion is integrally formed with a rear side of the goggle frame. The resilient face engaging portion includes edges on two sides of a lower end, which edges are formed with a curved shape based on a human face contour. When the goggle frame and the lens are assembled with a strap buckled to the two sides for use and with the resilient face engaging portion on the rear side of the goggle frame in contact with a user's face and cheekbones, the recesses formed on the two sides of the lower end of the rigid goggle body provide the resilient face engaging portion with a larger space for flexible adjustment.