The present invention relates to a plantable gabion and a constructing method thereof capable of facilitating planting by forming a planting space unit as grooves formed at both sides of the gabion are attached to each other. The plantable gabion comprises a gabion main body and grooves. The gabion main body is formed in a box shape and includes a bottom net, a lateral net installed to be vertical at the edge of the bottom net, front and rear wall nets, and a cover net for opening/closing the upper part of the lateral net and the front and rear wall nets.본 발명은 돌망태의 양측에 형성된 홈이 서로 접해 식생공간부를 형성하여 식생이 용이하고 시공이 쉬운 식생형 돌망태 및 그 시공방법에 관한 것이다.