From fine individual, such as the shrimp larvae to individuals length is more than 100mm, to provide individual counting device with excellent high economic efficiency versatility that can be counted by the slight design changes. To achieve this, the solids to be counted is transported by the flow of a fluid, and counted for the inclined passage 21 which is the counting unit 23 at least partially formed by a translucent material, the counting inclined channel an illumination unit 24 for irradiating light from the lower side to the counting unit 23 of the 21, takes in the counting image by the camera 26 disposed on the upper side of the measuring unit 23, based on data of the captured image, the counting section me to integrate the image analysis unit that measures the number of individuals passing through together with the liquid as the counting unit 20. The individual loading unit 30 on the upstream side of the counting for the inclined channel 21 in the counting unit 20 will be consolidated arranged independently of the counting for the inclined channel 21. Individuals carry-out section 40 on the downstream side of the counting for the inclined channel 21 I linked arranged independently of the counting for the inclined channel.海老の幼生のような微細な個体から体長が100mmを超える個体までを、僅かの設計変更により計数できる汎用性が高く経済性に優れた個体計数装置を提供する。これを実現するために、計数すべき固体を流体の流動により搬送し、少なくとも一部が透光性材料により形成されて計数部23とされた計数用傾斜流路21と、計数用傾斜流路21の計数部23に下側から光を照射する照明部24と、当該計測部23の上側に配置されたカメラ26により計数用画像を取り込むと共に、その取り込み画像のデータに基づいて、前記計数部を液体と共に通過する個体の個数を計測する画像解析部とを計数ユニット20として一体化する。計数ユニット20における計数用傾斜流路21の上流側に個体搬入部30を前記計数用傾斜流路21から独立して連結配置する。前記計数用傾斜流路21の下流側に個体搬出部40を前記計数用傾斜流路から独立して連結配置する。
