A portable pipe saw assembly includes a saw that may be manipulated thereby facilitating the saw to engage a member. The saw has a pair of housings. The housings are spaced apart from each other to define a cutting space. The cutting space receives the member. The cutting space has a width of at least sixteen inches and a depth of at least twenty inches. A cutting unit is movably coupled to the saw. The cutting unit engages the member thereby facilitating the cutting unit to cut the member.