Provided is a seedling transplanter capable of simultaneously reducing the weight and the number of parts, increasing the strength of members constituting a leveling rotor, and improving the leveling performance. A planting main frame (240a) for supporting a planting device (200) and side frames (240b) fixed to the left and right sides of the planting main frame (240a) are provided, in which the planting main frame (240a) is configured to have a shape protruding from the side frame (240b) to the front side of the machine body. A leveling frame (100a) constituting the leveling device and a leveling stay for holding the leveling frame (100a) are provided, in which the leveling stay includes a first leveling stay (110a) for supporting the leveling frame (100a) from the planting main frame (240a) and a second leveling stay (110b) for supporting the leveling frame (100a) from the side frames (240b). The second leveling stay (110b) is a posture in which the support posture is toward the lower front of the machine body than the first leveling stay (110a).本發明提供一種苗移植機，係能夠同時使構成平整輥的構件與以往相比大幅輕量化、削減配件數量以及強度提升，並且提高平整性能。苗移植機係設置有支撐栽種裝置(200)的栽種主框架(240a)以及固定在栽種主框架(240a)的左右側的側框架(240b)，前述栽種主框架(240a)係作成比側框架(240b)還向機體前側突出的形狀；設置有構成平整裝置的平整框架(100a)以及保持平整框架(100a)的平整固定件，平整固定件係由從栽種主框架(240a)支撐前述平整框架(100a)的第一平整固定件(110a)以及從側框架(240b)支撐平整框架(100a)的第二平整固定件(110b)所構成，第二平整固定件(110b)為支撐姿勢比第一平整固定件(110a)還朝向機體前方下位的姿勢。
