PROBLEM TO BE SOLVED: To provide a plant cultivation device capable of suppressing twisting and bending while simplifying the structure of a cultivation tray transferring mechanism for transferring a cultivation tray to be inserted into/taken out of an optionally selected cultivation tray storage shelf, and capable of being operated smoothly and efficiently space-wise.SOLUTION: The plant cultivation device 100 includes: a plurality of cultivation tray storage shelves 110 disposed in a plurality of stages and in a plurality of rows for storing cultivation trays 120 in which a plurality of plant roots S can be cultivated； and the cultivation tray transferring mechanism 150 for transferring the cultivation trays 120. The cultivation tray transferring mechanism 150 includes: a transferring shelf 152； a pair of linear guides 158； a pair of lifting guides 151 and a lifting means for lifting the transferring shelf.【課題】栽培トレイを任意の栽培トレイ収容棚に入出移動させる栽培トレイ移載機構の構成を単純化しつつ、捩れや撓みを抑制することが可能で、スペース効率良く円滑に動作可能となる植物栽培装置を提供すること。【解決手段】複数段および複数列に配置されて複数の植物株Ｓを栽培可能な栽培トレイ１２０を各々収容可能な複数の栽培トレイ収容棚１１０と、栽培トレイ１２０を移動させる栽培トレイ移載機構１５０とを有する植物栽培装置１００において、栽培トレイ移載機構１５０が移載棚１５２と、１対のリニアガイド１５８と、１対の昇降ガイド１５１と、移載棚を昇降させる昇降手段とを有すること。【選択図】図１
