An electrically heated support according to the present invention includes: a pillar shaped honeycomb structure, the honeycomb structure including an outer peripheral wall and a partition wall, the partition wall defining a plurality of cells, each of the cells penetrating from one end face to other end face to form a flow path; and a pair of electrode terminals provided on a surface of the outer peripheral wall. In a cross section of the honeycomb structure, the honeycomb structure includes: a plurality of first slits arranged, the first slits being configured to define an energizing path; and a least one second slit located in the energizing path, the second slit extending in a different direction from that of the first slits. A length of the energizing path from one electrode terminal to the other electrode terminal is longer than a diameter of the honeycomb structure.