A regulator circuit, comprising: an output controlling transistor which is connected between a voltage input terminal to which a DC voltage is input and an output terminal; and a controller circuit comprising an error amplifier circuit which controls the output controlling transistor according to an output feedback voltage, wherein the error amplifier circuit comprises: a differential input stage which comprises a pair of input transistors (Mn1, Mn2) and a current source for supplying a current to the input transistors (Mn1, Mn2); an output stage which comprises a current source and a transistor connected in series with the current source and which amplifies a potential at one output node of the differential input stage; and a current increasing/decreasing circuit configured to increase or decrease a current of the current source of the differential input stage or a current of the current source of the output stage, and wherein the current increasing/decreasing circuit comprises an element having a temperature characteristic, and is configured to increase or decrease the current of the current source of the differential input stage or the current of the current source of the output stage according to the temperature characteristic of the element, in which the element having the temperature characteristic is constituted by a MOS transistor (Mp6; Mn6) with a gate terminal and a source terminal connected to each other. an output controlling transistor which is connected between a voltage input terminal to which a DC voltage is input and an output terminal; and a controller circuit comprising an error amplifier circuit which controls the output controlling transistor according to an output feedback voltage, wherein the error amplifier circuit comprises: a differential input stage which comprises a pair of input transistors (Mn1, Mn2) and a current source for supplying a current to the input transistors (Mn1, Mn2); an output stage which comprises a current source and a transistor connected in series with the current source and which amplifies a potential at one output node of the differential input stage; and a current increasing/decreasing circuit configured to increase or decrease a current of the current source of the differential input stage or a current of the current source of the output stage, and wherein the current increasing/decreasing circuit comprises an element having a temperature characteristic, and is configured to increase or decrease the current of the current source of the differential input stage or the current of the current source of the output stage according to the temperature characteristic of the element, in which the element having the temperature characteristic is constituted by a MOS transistor (Mp6; Mn6) with a gate terminal and a source terminal connected to each other. a differential input stage which comprises a pair of input transistors (Mn1, Mn2) and a current source for supplying a current to the input transistors (Mn1, Mn2); an output stage which comprises a current source and a transistor connected in series with the current source and which amplifies a potential at one output node of the differential input stage; and a current increasing/decreasing circuit configured to increase or decrease a current of the current source of the differential input stage or a current of the current source of the output stage, and wherein the current increasing/decreasing circuit comprises an element having a temperature characteristic, and is configured to increase or decrease the current of the current source of the differential input stage or the current of the current source of the output stage according to the temperature characteristic of the element, in which the element having the temperature characteristic is constituted by a MOS transistor (Mp6; Mn6) with a gate terminal and a source terminal connected to each other.