A heater for a fuser , the heater comprising: a substrate ; a first heating element and a second heating element , each provided on the substrate , extending in a length direction (L) of the substrate , and respectively provided at a first side and a second side of the substrate in a width direction (W) of the substrate , the second side being opposite of the first side; and a third heating element and a fourth heating element , each provided on the substrate, extending in the length direction, to form a first inner area between the third and fourth heating elements, the third heating element arranged in the width direction (W) to correspond to the first heating element and between the first heating element and fourth heating element, and the fourth heating element arranged in the width direction (W) to correspond to the second heating element and between the second heating element and the third heating element, characterized in that an inner distance (d) at a center in the length direction (L) of the first inner area between the third heating element and the fourth heating element is greater than or equal to a sum of widths of each of the first heating element, second heating element, third heating element, and fourth heating element, at least one of the first heating element or the corresponding third heating element has a heating value per a unit length that is different in a center of the at least one of the first heating element or the corresponding third heating element, in the length direction (L), compared to an end of the first heating element or the corresponding third heating element, in the length direction (L). a substrate ; a first heating element and a second heating element , each provided on the substrate , extending in a length direction (L) of the substrate , and respectively provided at a first side and a second side of the substrate in a width direction (W) of the substrate , the second side being opposite of the first side; and a third heating element and a fourth heating element , each provided on the substrate, extending in the length direction, to form a first inner area between the third and fourth heating elements, the third heating element arranged in the width direction (W) to correspond to the first heating element and between the first heating element and fourth heating element, and the fourth heating element arranged in the width direction (W) to correspond to the second heating element and between the second heating element and the third heating element, characterized in that an inner distance (d) at a center in the length direction (L) of the first inner area between the third heating element and the fourth heating element is greater than or equal to a sum of widths of each of the first heating element, second heating element, third heating element, and fourth heating element, at least one of the first heating element or the corresponding third heating element has a heating value per a unit length that is different in a center of the at least one of the first heating element or the corresponding third heating element, in the length direction (L), compared to an end of the first heating element or the corresponding third heating element, in the length direction (L). <EOS>