Disocactus martianus) is a species of cactus found in Oaxaca, Mexico.

[1][3] Disocactus martianus grows creeping, occasionally forming lithophytic with aerial roots.

It is a species of fleshy, cylindrical suspended or creeping cactus with stems up to 1.5 meters long and up to 2.5 centimeters thick, sometimes with aerial roots, with 8 to 10 slightly wart-shaped ribs; 3 or 4 central pale brown spines up to 12 mm long and 6 to 20 radial spines are light yellowish and only 5 to 7 millimeters long.

They are followed by globose fruits of green color and 2 cm in diameter.

[4] It was first described as Cereus martianus in 1837 by Ludwig Georg Karl Pfeiffer.