When relative importance of built-in ones is large, lightening entire relative importance with suffering inspection internal without impairing the introduction characteristic to suffering inspection internal, it designates that it offers the capsule type endoscope which can do the observation which raised to the liquid as purpose, the case where it is introduced into suffering inspection internal form memory alloy make spring material 14 cubic measure variable section 13 by the fact that the memory form which is made to displace to the receipt position which is received inside capsule type frame 11 is displayed, reaches the size which does not impair the introduction characteristic to suffering inspection internal after depending upon the body temperature of the suffering inspection body, introducing into suffering inspection internal, appropriatenessForm memory alloy make spring material 14 exposing cubic measure variable section 13 outside capsule type frame 11 with water temperature, when by the fact that the memory form which is made to displace to the exposure position which increases frame cubic measure is displayed, as for cubic measure variable section 13 while from the air hole 13a inhalation to do the air inside, in suffering inspection internal displacing to exposure position, frame cubic measure increases and relative importance of built-in ones 12 is large, lightening entire relative importance by the fact that also water 3 introduces into suffering inspection internal, it made the observation which raised to water 3 possible.内蔵物の比重が大きい場合であっても被検体内への導入性を損なうことなく被検体内で全体の比重を軽くして液体に浮かせた観察を行えるカプセル型内視鏡を提供することを目的とし、被検体内に導入される際には被検体の体温によって形状記憶合金製ばね材14が体積可変部13をカプセル型筐体11内に収納される収納位置に変位させる記憶形状を呈することで、被検体内への導入性を損なわないサイズとなり、被検体内に導入した後、適宜水3も被検体内に導入することで水温によって形状記憶合金製ばね材14が体積可変部13をカプセル型筐体11外に露出して筐体体積を増加させる露出位置に変位させる記憶形状を呈することで、体積可変部13は被検体内において通気孔13aから外気を内部に吸気しながら露出位置に変位して筐体体積が増加し内蔵物12の比重が大きい場合であっても全体の比重を軽くして水3に浮かせた観察を可能にした。
