To provide a raw paper for paper yarn mainly composed of a natural fiber, having strength even in low basis weight, preventing occurrence of paper cut trouble in slit processing and having good texture.

The raw paper for paper yarn is mainly composed of a natural fiber and has 5-40 g/m2 basis weight. In the raw paper for paper yarn, Runkel ratio of the natural fiber is ≤2.5 and the ratio of a fraction having ≥5 mm length weight fiber length distribution is ≤20% and length weight average fiber length is 2-4 mm and fiber roughness of natural fiber is ≤30 mg/100 m and the natural fiber is Manila hemp. The raw paper for paper yarn has ≥8 ratio of tensile strength in the horizontal direction to tensile strength in the vertical direction and ≥110 m tear strength in vertical direction.