A refrigerator having an ice-making chamber, comprising: a refrigerator body comprising a freezing chamber provided at a lower portion thereof and a refrigerating chamber provided at an upper portion thereof; a refrigerating chamber door configured to open and close the refrigerating chamber; an ice-making chamber formed in the refrigerating chamber door; and a sidewall cool air duct disposed at a sidewall of the refrigerator body to provide cool air from the freezing chamber to the ice-making chamber, wherein the ice-making chamber comprises: an ice-making chamber body, one side of which is opened, the ice-making chamber body comprising a first sidewall and a second sidewall; and a connecting duct provided in the first sidewall of the ice-making chamber to be connected to the sidewall cool air duct of the refrigerator body; characterized by: an ice-making chamber door provided at the second sidewall of the ice-making chamber to open and close the ice-making chamber, a protrusion portion (181, 231, 241) provided at the first sidewall and formed to be protruded with a predetermined length from an end of the first sidewall to be disposed at a side of the ice-making chamber door, wherein the connecting duct is disposed to be inclined with respect to a width direction of the ice-making chamber door in such a manner that an outer side end thereof brought into contact with the sidewall cool air duct is further separated from the refrigerating chamber door compared to an inner side end thereof disposed inside the ice-making chamber and a region of the connecting duct is disposed inside the protrusion portion (181, 231, 241). a refrigerator body comprising a freezing chamber provided at a lower portion thereof and a refrigerating chamber provided at an upper portion thereof; a refrigerating chamber door configured to open and close the refrigerating chamber; an ice-making chamber formed in the refrigerating chamber door; and a sidewall cool air duct disposed at a sidewall of the refrigerator body to provide cool air from the freezing chamber to the ice-making chamber, wherein the ice-making chamber comprises: an ice-making chamber body, one side of which is opened, the ice-making chamber body comprising a first sidewall and a second sidewall; and a connecting duct provided in the first sidewall of the ice-making chamber to be connected to the sidewall cool air duct of the refrigerator body; an ice-making chamber body, one side of which is opened, the ice-making chamber body comprising a first sidewall and a second sidewall; and a connecting duct provided in the first sidewall of the ice-making chamber to be connected to the sidewall cool air duct of the refrigerator body; an ice-making chamber door provided at the second sidewall of the ice-making chamber to open and close the ice-making chamber, a protrusion portion (181, 231, 241) provided at the first sidewall and formed to be protruded with a predetermined length from an end of the first sidewall to be disposed at a side of the ice-making chamber door, wherein the connecting duct is disposed to be inclined with respect to a width direction of the ice-making chamber door in such a manner that an outer side end thereof brought into contact with the sidewall cool air duct is further separated from the refrigerating chamber door compared to an inner side end thereof disposed inside the ice-making chamber and a region of the connecting duct is disposed inside the protrusion portion (181, 231, 241).