A refrigerator comprising: a storage compartment cooling to preserve an article-to-be-stored; a cooler generating cool air; a cool air passage arranged at a rear face of the storage compartment and through which cool air generated by the cooler flows; a discharge port (103a, 103b, 104a, 104b, 105a, 105b) opened in the cool air passage and discharging cool air into the storage compartment; and an ion generator arranged in the cool air passage and generating ions, characterized in that the cool air passage includes an inlet portion into which cold air from the cooler flows along the rear face of the storage compartment, a widened portion which is arranged downstream of the inlet portion, in which a flow passage after cool air has flowed into the inlet portion is wider than in the inlet portion, and which is arranged along the rear face of the storage compartment, and first and second branched passages (32a, 32b) branching from the widened portion forming the flow passage after cool air has flowed into the inlet portion, the discharge port (103a, 103b, 104a, 104b, 105a, 105b) is arranged inside or downstream of the widened portion, and the ion generator is arranged in the inlet portion arranged upstream of the widened portion from which the first and second branched passages (32a, 32b) branch. a storage compartment cooling to preserve an article-to-be-stored; a cooler generating cool air; a cool air passage arranged at a rear face of the storage compartment and through which cool air generated by the cooler flows; a discharge port (103a, 103b, 104a, 104b, 105a, 105b) opened in the cool air passage and discharging cool air into the storage compartment; and an ion generator arranged in the cool air passage and generating ions, characterized in that the cool air passage includes an inlet portion into which cold air from the cooler flows along the rear face of the storage compartment, a widened portion which is arranged downstream of the inlet portion, in which a flow passage after cool air has flowed into the inlet portion is wider than in the inlet portion, and which is arranged along the rear face of the storage compartment, and first and second branched passages (32a, 32b) branching from the widened portion forming the flow passage after cool air has flowed into the inlet portion, the discharge port (103a, 103b, 104a, 104b, 105a, 105b) is arranged inside or downstream of the widened portion, and the cool air passage includes an inlet portion into which cold air from the cooler flows along the rear face of the storage compartment, a widened portion which is arranged downstream of the inlet portion, in which a flow passage after cool air has flowed into the inlet portion is wider than in the inlet portion, and which is arranged along the rear face of the storage compartment, and first and second branched passages (32a, 32b) branching from the widened portion forming the flow passage after cool air has flowed into the inlet portion, the discharge port (103a, 103b, 104a, 104b, 105a, 105b) is arranged inside or downstream of the widened portion, and the ion generator is arranged in the inlet portion arranged upstream of the widened portion from which the first and second branched passages (32a, 32b) branch.