A drip detection apparatus capable of easily detecting a liquid drop falling in a drip tube and an infusion pump using the drip detection apparatus. A drip detection device for detecting a liquid droplet MD that is used by being attached to a drip tube 39 and that falls within the drip tube 39, a light emitting element 42 disposed on one side outside the drip tube 39; And a light receiving element 43 disposed opposite to the light emitting element 42 with the infusion tube 39 interposed therebetween. The light emitting element 42 includes a plurality of light emitting elements 42 that sequentially emit light with a time difference. Is smaller in number than the light emitting element 42, and the diffusion unit 57 diffuses the light emitted from the light emitting element 42 in the direction in which the plurality of light emitting elements 42 a to 42 c are arranged closer to the light emitting element 42 than the infusion tube 39. Is provided. [Selection] Figure 4【課題】点滴筒内で落下する液滴を容易に検出できる点滴検出装置、及びこれを利用した輸液ポンプを提供すること。【解決手段】点滴筒39に取り付けて用いられ、点滴筒39内を落下する液滴MDを検出する点滴検出装置であって、点滴筒39の外部の一側に配置される発光素子42と、点滴筒39を挟んで発光素子42に対向して配置された受光素子43とを備えており、発光素子42は複数からなり、互いに時間差を付けて順次発光するようになっており、受光素子43は発光素子42に比べて個数が少なく、点滴筒39よりも発光素子42側には、発光素子42から照射される光を、少なくとも複数の発光素子42a~42cが並ぶ方向に拡散させる拡散部57が設けられていることを特徴とする。【選択図】図4