Low-substituted hydroxypropyl cellulose having a hydroxypropoxy group content of 5 to 16% by mass and a volume fraction of long fibrous particles of more than 50.0% relative to all of low-substituted hydroxypropyl cellulose particles, the all of low-substituted hydroxypropyl cellulose particles, being classified, on a basis of dynamic image analysis, into fine particles, spherical particles, the long fibrous particles and short fibrous particles; wherein the fine particles have a length of fiber of less than 40 μm; the spherical particles have a length of fiber of 40 μm or more and consist of first and second spherical particles, wherein the first spherical particles have an elongation, which is a ratio of a diameter of fiber to a length of fiber, of 0.5 or more, and the second spherical particles have an elongation of less than 0.5, an aspect ratio, which is a ratio of a minimum Feret diameter to a maximum Feret diameter, of 0.5 or more, and a circularity, which is a ratio of a perimeter (P EQPC ) of a circle that has the same area as a projection area of a particle to a real perimeter (P real ) of a particle, of 0.7 or more; the long fibrous particles have a length of fiber of 200 μm or more and an elongation of less than 0.5, and consist of first and second long fibrous particles, wherein the first long fibrous particles have an aspect ratio of less than 0.5, and the second long fibrous particles have an aspect ratio of 0.5 or more and a circularity of less than 0.7; and the short fibrous particles have a length of fiber of 40 μm or more and less than 200 μm and an elongation of less than 0.5, and consist of first and second short fibrous particles, wherein the first short fibrous particles have an aspect ratio of less than 0.5, and the second short fibrous particles have an aspect ratio of 0.5 or more and a circularity of less than 0.7. the fine particles have a length of fiber of less than 40 μm; the spherical particles have a length of fiber of 40 μm or more and consist of first and second spherical particles, wherein the first spherical particles have an elongation, which is a ratio of a diameter of fiber to a length of fiber, of 0.5 or more, and the second spherical particles have an elongation of less than 0.5, an aspect ratio, which is a ratio of a minimum Feret diameter to a maximum Feret diameter, of 0.5 or more, and a circularity, which is a ratio of a perimeter (P EQPC ) of a circle that has the same area as a projection area of a particle to a real perimeter (P real ) of a particle, of 0.7 or more; the long fibrous particles have a length of fiber of 200 μm or more and an elongation of less than 0.5, and consist of first and second long fibrous particles, wherein the first long fibrous particles have an aspect ratio of less than 0.5, and the second long fibrous particles have an aspect ratio of 0.5 or more and a circularity of less than 0.7; and the short fibrous particles have a length of fiber of 40 μm or more and less than 200 μm and an elongation of less than 0.5, and consist of first and second short fibrous particles, wherein the first short fibrous particles have an aspect ratio of less than 0.5, and the second short fibrous particles have an aspect ratio of 0.5 or more and a circularity of less than 0.7. <EOS>