Element analysis device, mounting jig, and mounting method

An elemental analysis device that includes a first electrode and a second electrode between which a crucible containing a sample is nipped, and that heats the sample by applying a current between the first electrode and the second electrode, wherein

• the first electrode includes
• a first electrode main body that is provided with a housing recess where the crucible is housed,
• a first electrode tip that is provided, with a part of the first electrode tip exposed to an inside of the housing recess of the first electrode main body, and
• a fixing structure that is provided between the first electrode main body and the first electrode tip, and removably fixes the first electrode tip to the first electrode main body, the fixing structure being a first screwing structure including a male thread and a female thread that are provided between the first electrode main body and the first electrode tip,
• wherein the first electrode tip includes
• an inserted tube an outer circumferential surface of which is provided with the male thread, and that is inserted into the sample inlet of the first electrode main body,
• a flange portion that is a portion exposed to the inside of the housing recess and that extends in a radial direction from one end of the inserted tube,
• a through-hole extending through the inserted tube and the flange portion in the axial direction, and
• a gas releasing groove provided on the flange portion in such a manner that at least one end of the gas releasing groove opens to the through-hole, and extends in the radial direction.