Diffusion promotion device and ion introduction system

A diffusion promotion device having an accommodation space for accommodating a liquid agent supply device for supplying the liquid agent into surface layer of an object is formed internally, which generates an electric current for promoting diffusion of an active ingredient in the liquid agent under a surface of an object, wherein

• the liquid agent supply device comprises:
• a shaft portion in which a liquid agent storage space for storing the liquid agent is formed along with a first direction;
• and
• a liquid agent supply unit disposed at a first end portion in the first direction side of the shaft portion, supplying the liquid agent contained in the liquid agent storage space to the subject, and
• the diffusion promotion device comprises:
• a first cylindrical member having a first accommodation space being formed internally for accommodating a predetermined portion located in a second direction side, which is opposite to the first direction side, of the liquid agent supply device, and the first accommodation space is disposed along a third direction parallel to the first direction;
• a second cylindrical member having a first through-hole and a second accommodation space being formed internally for accommodating a predetermined portion in the first direction side of the liquid agent supply device and being disposed in the third direction side of the first cylindrical member, wherein the second cylindrical member allows the liquid agent supply device along with the third direction so as to pass the first through-hole, and the liquid agent supply device along with the third direction not so as to pass the first through-hall, and;
• a first electrode being used to promote diffusion of the active ingredient;
• a second electrode being used to form a current path passing through the surface layer of the object with the first electrode when diffusion of the active ingredient is being promoted;
• and
• a battery unit that generates a predetermined potential difference between the first electrode and the second electrode, and wherein
• the accommodation space is formed of the first accommodation space and the second accommodation space.