Characteristics of flame propagation along a nonpremixed vortex ring, which is generated by the ejection of propane by a single stroke motion of a speaker, are investigated experimentally. A Nd:YAG laser is used as the ignition source to prevent it from disturbing the flow fields. A schlieren technique is adopted for flow visualization, through which the dimension and translational velocity of the vortex ring are measured and the ignition location and timing are determined. Flame shapes and flame displacement speeds are measured from ICCD images and high speed photographs.