To provide a field emission electron source, and to provide a manufacturing method thereof.

The field emission electron source includes a conductive substrate and an electron emission part. The electron emission part includes at least one carbon nanotube wire which has a first end and a second end opposed to the first end. The first end is electrically connected to the conductive substrate, the second end is extended from the conductive substrate outside and has a plurality of field emission tips. Further, the manufacturing method of the field emission electron source is also provided.