A filler comprising a hyaluronic acid hydrogel including crosslinked hyaluronic acid, wherein a ratio of lift capability of an unit content (w/w%) of the hyaluronic acid contained in the filler relative to a modification degree (mol%) represents 60 to 180 ((Pa*N/(w/w)%)/mol%) in accordance with Equation 3 below. Lift Capability per Hyaluronic Acid Unit Content and Modification Degree = A/B wherein, A represents a value obtained by dividing a lift capability represented by Equation 1 below by the unit content *w/w%) of hyaluronic acid contained in the filler, and B represents a modification degree represented by Equation 2 below. Lift Capability (Pa*N) = Storage Elastic Modulus × Cohesive Force Modification degree (mol%) = (mole number of total crosslinking agent bonded to the entire hyaluronic acid molecule / the number of moles of total (N-acetyl-D-glucosamine + D- glucuronic acid)) * 100, wherein the B value represents a modification degree of 2 to 5 mol%, wherein the cohesive force represents 1.0 to 1.7 N, wherein the Storage Elastic Modulus is measured with an Oscillatory and Rotational Rheometer at a frequency of 1 Hz, at 25 °C, with 4 % strain, a measuring gap of 25 mm plate/plate and a measuring gap of 1.0 mm, and wherein the cohesive force is measured with an Oscillatory and Rotational Rheometer at an initial gap position of 1.0 mm and final gap position of 15 mm, with a speed of 0.93 mm/s, at 25 °C and a measuring geometry of 25 mm plate/plate, wherein the modification degree is measured with a FT-NMR System, and wherein Example 1 from EP patent application EP19830465.1, and Example 2 from EP patent application EP19830465.1 are not claimed. wherein a ratio of lift capability of an unit content (w/w%) of the hyaluronic acid contained in the filler relative to a modification degree (mol%) represents 60 to 180 ((Pa*N/(w/w)%)/mol%) in accordance with Equation 3 below. Lift Capability per Hyaluronic Acid Unit Content and Modification Degree = A/B wherein, A represents a value obtained by dividing a lift capability represented by Equation 1 below by the unit content *w/w%) of hyaluronic acid contained in the filler, and B represents a modification degree represented by Equation 2 below. Lift Capability (Pa*N) = Storage Elastic Modulus × Cohesive Force Modification degree (mol%) = (mole number of total crosslinking agent bonded to the entire hyaluronic acid molecule / the number of moles of total (N-acetyl-D-glucosamine + D- glucuronic acid)) * 100, wherein the B value represents a modification degree of 2 to 5 mol%, wherein the cohesive force represents 1.0 to 1.7 N, wherein the Storage Elastic Modulus is measured with an Oscillatory and Rotational Rheometer at a frequency of 1 Hz, at 25 °C, with 4 % strain, a measuring gap of 25 mm plate/plate and a measuring gap of 1.0 mm, and wherein the cohesive force is measured with an Oscillatory and Rotational Rheometer at an initial gap position of 1.0 mm and final gap position of 15 mm, with a speed of 0.93 mm/s, at 25 °C and a measuring geometry of 25 mm plate/plate, wherein the modification degree is measured with a FT-NMR System, and wherein Example 1 from EP patent application EP19830465.1, and Example 2 from EP patent application EP19830465.1 are not claimed.