A drawer slide assembly, comprising: a first rail; and a second rail longitudinally displaceable with respect to the first rail; a drawer frame member including a carrier and a drawer sidewall connected to the carrier, wherein the carrier is mounted on the second rail; and an adjusting device mounted on the drawer sidewall and configured to adjust the drawer frame member vertically with respect to the second rail, wherein the adjusting device includes a housing, a moving member displaceable with respect to the housing and having a pressing portion, and a cam; the housing is mounted on the drawer sidewall and includes a first and a second supporting base (62a, 62b) jointly defining a moving space and a passage therebetween which are in communication with each other, wherein the moving member is located in the moving space and corresponds to the passage and wherein each of the two supporting bases (62a, 62b) has a pivot hole and the cam has a shaft portion pivotally provided in the pivot holes of the two supporting bases (62a, 62b) and wherein the first supporting base is concavely provided with a receiving groove for receiving the cam; the cam has a C-shaped groove and wherein at least a portion of the pressing portion of the moving member extends into the C-shaped groove, wherein at least a portion of the cam is pressed against the pressing portion of the moving member such that, by rotating the cam, the moving member is displaced with respect to the housing; and wherein the moving member has a position-limiting groove and the cam has a portion located in the position-limiting groove, wherein the position-limiting groove has a height, which is defined as the distance between the upper and the lower ends of the position limiting groove, and has a width, which is defined as the distance between the two lateral sides of the position-limiting groove, and wherein the width of the portion is substantial equal to the width of the position-limiting groove and the height of the portion is less than the height of the position-limiting groove. a first rail; and a second rail longitudinally displaceable with respect to the first rail; a drawer frame member including a carrier and a drawer sidewall connected to the carrier, wherein the carrier is mounted on the second rail; and an adjusting device mounted on the drawer sidewall and configured to adjust the drawer frame member vertically with respect to the second rail, wherein the adjusting device includes a housing, a moving member displaceable with respect to the housing and having a pressing portion, and a cam; the housing is mounted on the drawer sidewall and includes a first and a second supporting base (62a, 62b) jointly defining a moving space and a passage therebetween which are in communication with each other, wherein the moving member is located in the moving space and corresponds to the passage and wherein each of the two supporting bases (62a, 62b) has a pivot hole and the cam has a shaft portion pivotally provided in the pivot holes of the two supporting bases (62a, 62b) and wherein the first supporting base is concavely provided with a receiving groove for receiving the cam; the cam has a C-shaped groove and wherein at least a portion of the pressing portion of the moving member extends into the C-shaped groove, wherein at least a portion of the cam is pressed against the pressing portion of the moving member such that, by rotating the cam, the moving member is displaced with respect to the housing; and wherein the moving member has a position-limiting groove and the cam has a portion located in the position-limiting groove, wherein the position-limiting groove has a height, which is defined as the distance between the upper and the lower ends of the position limiting groove, and has a width, which is defined as the distance between the two lateral sides of the position-limiting groove, and wherein the width of the portion is substantial equal to the width of the position-limiting groove and the height of the portion is less than the height of the position-limiting groove.