A heating cooker comprising: an operation position detecting means one-dimensionally disposed and configured to detect a position operated by a user's finger; and a first setting level displaying means for displaying a setting level of one or more setting parameters including at least heating power, and a control unit, wherein the control unit is configured to perform the following steps: when the operation position detecting means is operated first at start of heating, the heating cooker displays on the first setting level displaying means a setting level of the setting parameter uniquely determined depending on an operated position of the operation position detecting means, when the operation position detecting means is operated after start of heating, the heating cooker changes the setting level of the setting parameter displayed on the first setting level displaying means, by using as a starting point the setting level displayed on the first setting level displaying means before the operation of the operation position detecting means after start of heating, depending on a movement distance and a movement direction of sliding of the finger along the operation position detecting means regardless of the setting level determined in the operation position detecting means at the time of a first operation at start of heating characterized in that when the finger is slid along the operation position detecting means in a direction of decreasing the setting level of the setting parameter displayed by the first setting level displaying means, a decrease amount of the level of the setting parameter corresponding to a movement distance in this case is larger than an increase amount of the level of the setting parameter corresponding to a movement distance when the finger is slid along the operation position detecting means in a direction of increasing the setting level of the setting parameter displayed by the first setting level displaying means. an operation position detecting means one-dimensionally disposed and configured to detect a position operated by a user's finger; and a first setting level displaying means for displaying a setting level of one or more setting parameters including at least heating power, and a control unit, wherein the control unit is configured to perform the following steps: when the operation position detecting means is operated first at start of heating, the heating cooker displays on the first setting level displaying means a setting level of the setting parameter uniquely determined depending on an operated position of the operation position detecting means, when the operation position detecting means is operated after start of heating, the heating cooker changes the setting level of the setting parameter displayed on the first setting level displaying means, by using as a starting point the setting level displayed on the first setting level displaying means before the operation of the operation position detecting means after start of heating, depending on a movement distance and a movement direction of sliding of the finger along the operation position detecting means regardless of the setting level determined in the operation position detecting means at the time of a first operation at start of heating characterized in that when the finger is slid along the operation position detecting means in a direction of decreasing the setting level of the setting parameter displayed by the first setting level displaying means, a decrease amount of the level of the setting parameter corresponding to a movement distance in this case is larger than an increase amount of the level of the setting parameter corresponding to a movement distance when the finger is slid along the operation position detecting means in a direction of increasing the setting level of the setting parameter displayed by the first setting level displaying means. when the operation position detecting means is operated first at start of heating, the heating cooker displays on the first setting level displaying means a setting level of the setting parameter uniquely determined depending on an operated position of the operation position detecting means, when the operation position detecting means is operated after start of heating, the heating cooker changes the setting level of the setting parameter displayed on the first setting level displaying means, by using as a starting point the setting level displayed on the first setting level displaying means before the operation of the operation position detecting means after start of heating, depending on a movement distance and a movement direction of sliding of the finger along the operation position detecting means regardless of the setting level determined in the operation position detecting means at the time of a first operation at start of heating characterized in that when the finger is slid along the operation position detecting means in a direction of decreasing the setting level of the setting parameter displayed by the first setting level displaying means, a decrease amount of the level of the setting parameter corresponding to a movement distance in this case is larger than an increase amount of the level of the setting parameter corresponding to a movement distance when the finger is slid along the operation position detecting means in a direction of increasing the setting level of the setting parameter displayed by the first setting level displaying means.