I'll second that - yes, it is the Heart Sutra.
Is that handwritten and hand-drawn on a leaf? Looks like it is stuck to a white piece of paper - is it framed for hanging? I hope it is not made into a bookmark, as that might cause improper placement of and disrespect to the sutra.
It seems to be from the Ling Yi Temple (灵隐寺, or in traditional Chinese characters 靈隐寺): http://www.lingyinsi.org