A binding machine includes: a magazine configured to hold a staple that includes a first leg portion and a second leg portion, and that has an opening between the first leg portion and the second leg portion; a driver configured to move the staple held by the magazine in a forward direction with the opening at the front; a guiding portion configured to guide an inside of the first leg portion when the staple is moved by the driver; and a displacement portion configured to bind an object to be bound inserted into the opening by displacing the first leg portion of the staple moved by the driver. The guiding portion retracts from a guide position for guiding the inside of the first leg portion when the staple moves by a predetermined distance.