The prftree package provides a package to write proof trees for natural deduction calculi, sequent-like calculi, and similar. The package is composed by the filed - prftree.sty: containing the LaTeX engine to typeset proof trees; - prftreedoc.pdf: the human readable documentation for the package; - prftreedoc.tex: the source code for the documentation. The package is distributed under the GNU General Public License.