The underwear with integrated lumbar support pad is an orthopedic device. The underwear with integrated lumbar support pad is an article of loin wear. The underwear with integrated lumbar support pad is adapted for use with a person. The article of loin wear has incorporated into it a back brace that provides lumbar support to the person wearing the underwear with integrated lumbar support pad. The underwear with integrated lumbar support pad adds a belt fastener within the waistband region generally associated with loin wear. Moreover, the belt fastener includes a lumbar support apparatus to accomplish the function of the underwear with integrated lumbar support pad. The underwear with integrated lumbar support pad comprises an article of loin wear and a brace.