A thermoelectric element comprising: a first substrate; a first insulating layer disposed on the first substrate; a first bonding layer disposed on the first insulating layer; a second insulating layer disposed on the first bonding layer; a first electrode part disposed on the second insulating layer; a thermoelectric leg part (340, 350) disposed on the first electrode part; a second electrode part disposed on the thermoelectric leg part (340, 350); a third insulating layer disposed on the second electrode part; and a second substrate disposed on the third insulating layer, wherein the first electrode part includes a plurality of first electrodes, the thermoelectric leg part (340, 350) includes a plurality of P type thermoelectric legs and a plurality of N type thermoelectric legs, and the second electrode part includes a plurality of second electrodes, wherein a pair of P type thermoelectric leg and N type thermoelectric leg is disposed on each first electrode and each second electrode, wherein a P type thermoelectric leg disposed on one of the plurality of first electrodes and a N type thermoelectric leg disposed on another of the plurality of first electrodes are disposed on one of the plurality of second electrodes, wherein the second insulating layer is formed of a resin layer including an inorganic filler and a resin composition including at least one of an epoxy resin and a polydimethylsiloxane, PDMS, resin, characterized in that: the first insulating layer is formed of a composite containing silicon and aluminum, and the first bonding layer includes a silane coupling agent. a first substrate; a first insulating layer disposed on the first substrate; a first bonding layer disposed on the first insulating layer; a second insulating layer disposed on the first bonding layer; a first electrode part disposed on the second insulating layer; a thermoelectric leg part (340, 350) disposed on the first electrode part; a second electrode part disposed on the thermoelectric leg part (340, 350); a third insulating layer disposed on the second electrode part; and a second substrate disposed on the third insulating layer, wherein the first electrode part includes a plurality of first electrodes, the thermoelectric leg part (340, 350) includes a plurality of P type thermoelectric legs and a plurality of N type thermoelectric legs, and the second electrode part includes a plurality of second electrodes, wherein a pair of P type thermoelectric leg and N type thermoelectric leg is disposed on each first electrode and each second electrode, wherein a P type thermoelectric leg disposed on one of the plurality of first electrodes and a N type thermoelectric leg disposed on another of the plurality of first electrodes are disposed on one of the plurality of second electrodes, wherein the second insulating layer is formed of a resin layer including an inorganic filler and a resin composition including at least one of an epoxy resin and a polydimethylsiloxane, PDMS, resin, characterized in that: the first insulating layer is formed of a composite containing silicon and aluminum, and the first bonding layer includes a silane coupling agent. the first insulating layer is formed of a composite containing silicon and aluminum, and the first bonding layer includes a silane coupling agent.