Huynh Thanh Chuc, 19, of Tien Giang Province in the Mekong Delta took a false step and fell from the scaffolding in an apartment building on National Highway 1A in Binh Tan District.
His co-workers were astonished to find him alive.
They provided him first aid and bandaged his wounds before taking him to a nearby hospital.
Chuc suffered fractures in his thigh and shoulder, and doctors said the wounds were not life-threatening.
He was later transferred to another hospital for treatment.