A two-chamber type combined container-syringe comprising: a cylinder having a first end portion, a second end portion in an opposite direction of the first end portion, and a bypass portion disposed between the first end portion and the second end portion; a finger grip mounted on the second end portion of the cylinder; a first stopper, a second stopper, and a third stopper that are sequentially disposed from the first end portion toward the second end portion in a space of the cylinder; and a plunger rod that is connected to the third stopper and has a plurality of support ribs provided to come in contact with an inner surface of the finger grip, wherein a space between the first stopper and the second stopper forms a front chamber, and a space between the second stopper and the third stopper forms a rear chamber, a first ingredient and a second ingredient are accommodated in the front chamber and the rear chamber, respectively, a length ratio of the front chamber and the rear chamber is in a range of 1.6:1 to 3:1 when the plunger rod is at an initial position which is a state before the front chamber and the rear chamber communicate with each other through the bypass portion, and at the initial position, one or more of the plurality of support ribs are disposed in at least one of the finger grip and a region in the cylinder that is adjacent to the finger grip, wherein the initial position is a state in which the first and second ingredients are accommodated in the front chamber and the rear chamber, respectively, before the plunger rod is moved forward, wherein the finger grip includes a grip portion and an extending portion that extends from the grip portion toward the plunger rod, wherein the grip portion includes a first surface having a first insertion hole formed at open one side and a second surface having a second insertion hole provided so that the plunger rod, which is in an opposite direction of the first surface, is inserted thereinto, wherein the second end portion of the cylinder is inserted to the first insertion hole of the grip portion, wherein the extending portion extends from the second surface of the grip portion in the longitudinal direction toward the plunger rod, and wherein, at the initial position, at least one support rib is disposed in the extending portion and at least one support rib is disposed in the cylinder. a cylinder having a first end portion, a second end portion in an opposite direction of the first end portion, and a bypass portion disposed between the first end portion and the second end portion; a finger grip mounted on the second end portion of the cylinder; a first stopper, a second stopper, and a third stopper that are sequentially disposed from the first end portion toward the second end portion in a space of the cylinder; and a plunger rod that is connected to the third stopper and has a plurality of support ribs provided to come in contact with an inner surface of the finger grip, wherein a space between the first stopper and the second stopper forms a front chamber, and a space between the second stopper and the third stopper forms a rear chamber, a first ingredient and a second ingredient are accommodated in the front chamber and the rear chamber, respectively, a length ratio of the front chamber and the rear chamber is in a range of 1.6:1 to 3:1 when the plunger rod is at an initial position which is a state before the front chamber and the rear chamber communicate with each other through the bypass portion, and at the initial position, one or more of the plurality of support ribs are disposed in at least one of the finger grip and a region in the cylinder that is adjacent to the finger grip, wherein the initial position is a state in which the first and second ingredients are accommodated in the front chamber and the rear chamber, respectively, before the plunger rod is moved forward, wherein the finger grip includes a grip portion and an extending portion that extends from the grip portion toward the plunger rod, wherein the grip portion includes a first surface having a first insertion hole formed at open one side and a second surface having a second insertion hole provided so that the plunger rod, which is in an opposite direction of the first surface, is inserted thereinto, wherein the second end portion of the cylinder is inserted to the first insertion hole of the grip portion, wherein the extending portion extends from the second surface of the grip portion in the longitudinal direction toward the plunger rod, and wherein, at the initial position, at least one support rib is disposed in the extending portion and at least one support rib is disposed in the cylinder.