A thermal head comprising: a plurality of heat generating parts which are aligned on a predetermined surface in a first direction along the predetermined surface, a plurality of first electrode parts which are connected with respect to the plurality of heat generating parts on one side of a second direction crossing the first direction in a plan view of the predetermined surface, a plurality of second electrode parts which are connected with respect to the plurality of heat generating parts on the other side of the second direction in a plan view of the predetermined surface, and a protective layer covering the plurality of heat generating parts, the plurality of first electrode parts, and the plurality of second electrode parts, wherein the protective layer comprises a plurality of first recessed parts located among the plurality of first electrode parts in a plan view of the predetermined surface, a plurality of second recessed parts located among the plurality of second electrode parts in a plan view of the predetermined surface, and a plurality of third recessed parts (57, 57a, 57b) located among the plurality of heat generating parts in a plan view of the predetermined surface; characterized in that the third recessed parts (57, 57a, 57b) are shallower than the plurality of first recessed parts and the plurality of second recessed parts. a plurality of heat generating parts which are aligned on a predetermined surface in a first direction along the predetermined surface, a plurality of first electrode parts which are connected with respect to the plurality of heat generating parts on one side of a second direction crossing the first direction in a plan view of the predetermined surface, a plurality of second electrode parts which are connected with respect to the plurality of heat generating parts on the other side of the second direction in a plan view of the predetermined surface, and a protective layer covering the plurality of heat generating parts, the plurality of first electrode parts, and the plurality of second electrode parts, wherein the protective layer comprises a plurality of first recessed parts located among the plurality of first electrode parts in a plan view of the predetermined surface, a plurality of second recessed parts located among the plurality of second electrode parts in a plan view of the predetermined surface, and a plurality of third recessed parts (57, 57a, 57b) located among the plurality of heat generating parts in a plan view of the predetermined surface; characterized in that the third recessed parts (57, 57a, 57b) are shallower than the plurality of first recessed parts and the plurality of second recessed parts. a plurality of first recessed parts located among the plurality of first electrode parts in a plan view of the predetermined surface, a plurality of second recessed parts located among the plurality of second electrode parts in a plan view of the predetermined surface, and a plurality of third recessed parts (57, 57a, 57b) located among the plurality of heat generating parts in a plan view of the predetermined surface; characterized in that the third recessed parts (57, 57a, 57b) are shallower than the plurality of first recessed parts and the plurality of second recessed parts.