A writing instrument holder for clip is disclosed. The writing instrument holder for clip is detachable from a clip having a clip body which is bent to have an insertion space into which a document is inserted, is closed by an elastic restoring force, and pressurizes the document, and a pair of handles which are coupled to the clip body and pressurize the clip body to widen, and includes a body unit, a fixing unit, and an elastic unit. The body unit is provided in the insertion space and comes in close contact with the inner surface of the clip body. The elastic unit connects the body unit and the fixing unit.