Provided is a binding machine used to erect a post and bind a stem or branch of a plant to the post to enable the stem or branch to maintain a desired posture during the cultivation of fruits, vegetables, or flowers or gardening. The binding machine is configured not to allow an operating lever to be moved down when a binding tape is hooked to a tape pulling needle to prevent an erroneous operation while the binding tape is being drawn out and configured to prevent an iron pin bundle from being loaded upside down onto an iron pin supply part and to prevent an iron pin push bar from arbitrarily escaping the iron pin supply part and being lost when the iron pin push bar is separated from the iron pin supply part.
