Temperature sensor and method of manufacturing temperature sensor

A method of manufacturing a temperature sensor, the temperature sensor including a thermosensitive element including a thermosensitive body, a lead wire connected to the thermosensitive element, and a covering body that is made of a resin and has a long shape, the covering body covering a part of the lead wire and the thermosensitive element, the method comprising:

• a housing step of housing the part of the lead wire and the thermosensitive element inside a material made of a resin;
• a heating step of heating the material;
• and
• a pressure forming step of pressurizing the material to form the material in a shape having a rectangular cross-section, wherein
• in the pressure forming step, in a first direction in the rectangular cross-section of the covering body and in a second direction orthogonal to the first direction in the rectangular cross-section of the covering body, a thickness of a region of the covering body covering the thermosensitive element is set less than a thickness of a region of the covering body covering the lead wire by deforming, by pressurization, the material on the thermosensitive element side by a deformation amount greater than a deformation amount of the material on the lead wire side,
• the region of the covering body covering the thermosensitive element is formed in a rectangular-parallelepiped shape, and
• each of the region of the covering body covering the thermosensitive element and the region of the covering body covering the lead wire have the rectangular cross-section having a constant thickness in the first direction and a constant thickness in the second direction, and wherein a boundary is formed between the region of the covering body covering the thermosensitive element and the region of the covering body covering the lead wire.