  We use the Chandra measurements of the X-ray gas mass fraction of 26 rich
clusters released by Allen et al. to perform constraints on the holographic
dark energy model. The constraints are consistent with those from other
cosmological tests, especially with the results of a joint analysis of
supernovae, cosmic microwave background, and large scale structure data. From
this test, the holographic dark energy also tends to behave as a quintom-type
dark energy.
