A syringe comprising: a syringe barrel including: a liquid-drug discharge portion on a distal end of the barrel, an opening on a proximal end of the barrel, and a body portion for storing a liquid-drug; a gasket inserted in the syringe barrel; and a plunger including: a shaft inserted in the syringe barrel from the opening and: a pressing portion located on a proximal end of the shaft, the pressing portion being pushable by a thumb to slide the gasket toward the liquid-drug discharge portion, wherein the syringe barrel is characterised in that it further includes: a brim-shaped finger hooking portion protruding from an outer circumferential surface of the syringe barrel so as to extend in a first direction, which is a radial direction approximately perpendicular to a central axis of the syringe barrel, the finger hooking portion being configured to be hooked with a finger; and a sleeve-shaped gripping portion that is located between a distal end of the finger hooking portion and a proximal end of the liquid-drug discharge portion and is configured to be held with at least a middle finger, a fourth finger, and a fifth finger, wherein the syringe barrel includes an annular protruding portion between the gripping portion and the opening, the annular protruding portion protruding outward from an outer circumferential surface of the gripping portion by 0.5 to 2 mm in a direction approximately perpendicular to the central axis, and wherein the finger hooking portion protrudes from an outer circumferential surface of the annular protruding portion by at least 4 mm in only one radial direction perpendicular to the central axis. a syringe barrel including: a liquid-drug discharge portion on a distal end of the barrel, an opening on a proximal end of the barrel, and a body portion for storing a liquid-drug; a liquid-drug discharge portion on a distal end of the barrel, an opening on a proximal end of the barrel, and a body portion for storing a liquid-drug; a gasket inserted in the syringe barrel; and a plunger including: a shaft inserted in the syringe barrel from the opening and: a pressing portion located on a proximal end of the shaft, the pressing portion being pushable by a thumb to slide the gasket toward the liquid-drug discharge portion, wherein the syringe barrel is characterised in that it further includes: a brim-shaped finger hooking portion protruding from an outer circumferential surface of the syringe barrel so as to extend in a first direction, which is a radial direction approximately perpendicular to a central axis of the syringe barrel, the finger hooking portion being configured to be hooked with a finger; and a sleeve-shaped gripping portion that is located between a distal end of the finger hooking portion and a proximal end of the liquid-drug discharge portion and is configured to be held with at least a middle finger, a fourth finger, and a fifth finger, wherein the syringe barrel includes an annular protruding portion between the gripping portion and the opening, the annular protruding portion protruding outward from an outer circumferential surface of the gripping portion by 0.5 to 2 mm in a direction approximately perpendicular to the central axis, and wherein the finger hooking portion protrudes from an outer circumferential surface of the annular protruding portion by at least 4 mm in only one radial direction perpendicular to the central axis. a brim-shaped finger hooking portion protruding from an outer circumferential surface of the syringe barrel so as to extend in a first direction, which is a radial direction approximately perpendicular to a central axis of the syringe barrel, the finger hooking portion being configured to be hooked with a finger; and a sleeve-shaped gripping portion that is located between a distal end of the finger hooking portion and a proximal end of the liquid-drug discharge portion and is configured to be held with at least a middle finger, a fourth finger, and a fifth finger, wherein the syringe barrel includes an annular protruding portion between the gripping portion and the opening, the annular protruding portion protruding outward from an outer circumferential surface of the gripping portion by 0.5 to 2 mm in a direction approximately perpendicular to the central axis, and wherein the finger hooking portion protrudes from an outer circumferential surface of the annular protruding portion by at least 4 mm in only one radial direction perpendicular to the central axis.