Ascocentrum ampullaceum is an species in the genus Ascocentrum.

Plants of Ascocentrum ampullaceum are found growing on trees in the forest of central China, Assam India, Bangladesh, the Himalayas, Nepal, Bhutan, Sikkim, Andaman Islands, Myanmar, Thailand, Laos and Vietnam at elevations of 300 to 900 meters.

They are best grown hanged in baskets and on mounted and require bright to full sunlight and intermediate to warm temperatures. If hunged the roots must be watered frequently. Slightly reduce watering in the winter. Plants should be grown in media that is well drained such as tree fern fibers (for small plants), several pieces of coarse fir bark, or sphagnum moss.