PROBLEM TO BE SOLVED: To provide an information transmission system capable of executing proper measures even when a caretaker in charge is present at a place far from a person in need of care.SOLUTION: The information processor includes: a state detection part for detecting the state of an object to be detected; a terminal detection part for detecting the proximity state of an electronic terminal; and an information transmission part for transmitting state information to one or more electronic terminals selected from among a first electronic terminal 300B determined to be close to the object to be detected in distance, a second electronic terminal 300A determined to be proximate to the object to be detected and a third electronic terminal determined to be associated with information related to the object to be detected on the basis of the detection result of the state detection part and the detection result of the terminal detection part.【課題】要介護者から離れた場所に担当介護者がいるなどの場合でも、適切な対処を実行可能な情報送信システムを提供する。【解決手段】被検対象の状態を検出する状態検出部と、電子端末の近接状態を検出する端末検出部と、状態検出部の検出結果及び端末検出部による検出結果に基づいて、被検対象との距離が近いと判定された第1電子端末300B、前記被検対象に近接したと判定された第2電子端末300A、及び予め被検対象に関する情報と関連付けられた第3電子端末、から選択された1以上の電子端末に状態情報を送信する情報送信部と、を備える。【選択図】図7