A coordinate detection apparatus includes: electrode arrays each including first/second/third electrodes extending in a first direction; and a processing unit. The first electrode includes first/second regions larger/smaller in dimension, with respect to the first direction, in parallel with a second direction orthogonal to the first direction. The second/third electrodes are smaller/larger in dimension, with respect to the first direction, in parallel with the second direction, and are opposed to the first/second regions in the second direction. The first/second/third electrodes are arranged in the second direction. Each electrode array outputs a capacitance value corresponding to a distance between it and a detection target. The processing unit calculates total sums (first/second/third values) of capacitance values of the respective first/second/third electrodes, and a sum of these total sums, and detects a position coordinate based on a different capacitance ratio depending on whether the second value is above or below the third value.