Magnetic sensor and magnetic sensor system

A magnetic sensor comprising:

• a first path and a second path through each of which a current flows;
• a plurality of structures disposed on the first path and the second path;
• and
• a plurality of first electrodes and a plurality of second electrodes that connect the plurality of structures in series, wherein
• the first path includes at least one first array,
• the second path includes at least one second array,
• the at least one first array and the at least one second array are disposed so as to be arranged in a first direction,
• the at least one first array and the at least one second array each include an odd number of structures among the plurality of structures, the odd number of structures being disposed so as to be arranged in a second direction,
• at least one of the odd number of structures is a structure including a magnetoresistive element, and
• the plurality of first electrodes and the plurality of second electrodes are disposed at different positions in a third direction, and the first electrodes and the second electrodes are alternately arranged one by one in a direction in which the current flows in each of the at least one first array and the at least one second array.