The present application discloses the double-head marker pen, and relates to the field of marker pen production technology, including a first penholder, a second penholder and a connecting tube ; one end of the first penholder is formed with a first pen head, and one end of the second penholder is formed with a second pen head; and an end of the first penholder away from the first pen head is detachably connected with an end of the second penholder away from the second pen head by the connecting tube.