Trichonephila clavata, also known as the Joro-spider (ジョロウグモ, Jorō-gumo), is a spider in the Trichonephila genus. Native to East Asia, it is found throughout China, Japan (except Hokkaidō), Korea, and Taiwan, and has been spreading across North America since the 2010s. It rarely bites humans, and its venom is not medically significant.

In 2019, this species was moved from the genus Nephila to Trichonephila, along with ten other species.

Trichonephila clavata pass winter as eggs and scatter as tiny juveniles in the spring. Like most spiders, females are much larger than males. The adult female's body size is 17–25 millimetres (0.67–0.98 in) while the male's is 7–10 millimetres (0.28–0.39 in).

The web of females may reach several meters in length. In sunlight, the yellow threads appear to be a rich gold color. The structure of the web seen in cross-section is unusual for an orb web; it has three layers: the central orb, plus two irregular layers in front and behind the orb.

Both males and females have large abdomen and long legs. The adult female individual has stripes of yellow and dark blue, with red toward the rear of the abdomen. In autumn, smaller males may be seen in the webs of the females for copulating. After mating, the female spins an egg sack on a tree, laying 400 to 1,500 eggs in one sack. Her lifecycle ends by late autumn or early winter with the death of the spider. The next generation emerges in spring.

This spider's bite does not pose significant risks to humans. Their small fangs and reluctant biting behavior make it unlikely for a bite to occur. When bites do take place, the venom is weak. The temporary pain and redness has been compared to that of a bee sting.

The common name of the spider comes from the jorōgumo, a legendary spider in Japanese folklore that can transform into a beautiful woman who can breathe fire and control other spiders. She seeks men to seduce, whom she then binds in her silk and devours.

N. clavata is a food for the Ao-Nagas.