PROBLEM TO BE SOLVED: To provide a cultivation vessel in which a cultivation bed having an appropriate size for a type of a cultivated crop can be formed, a cultivation bed formed by using the cultivation vessel, and a cultivation device using the cultivation bed.SOLUTION: A cultivation vessel accommodating culture soil for cultivation comprises: a polygonal shape floor, and a side wall which is arranged at each side of the floor. The cultivation vessel is configured to be capable of changing size of the floor. The floor of the cultivation vessel is a substantially quadrilateral shape. The cultivation vessel is configured so that the floor is a substantially rectangular shape, and floor width defined by a distance between two long-side side walls of the floor can be changed. The culture soil of the cultivation bed is accommodated in the cultivation vessel. A cultivation device comprises: the cultivation bed and a watering device which supplies the cultivation bed with a liquid fertilizer.COPYRIGHT: (C)2014,JPO&INPIT【課題】栽培したい作物の種類に対応した好ましいサイズの栽培床を形成することができる栽培容器、前記栽培容器を用いて形成される栽培床、および前記栽培を用いた栽培装置を提供する。【解決手段】栽培用の培土を収容する栽培容器であって、多角形の床、および床の各辺に設けられた側壁を備え、床のサイズが変更可能なように構成されている栽培容器。床が、略四角形である栽培容器。前記床が、略長方形であり、床の長辺側の2つの側壁間の距離により定まる床の幅が変更可能なように構成されている栽培容器。上記の栽培容器に培土が収容されている栽培床。上記の栽培床、および栽培床に液体肥料を供給する灌水装置を備えている栽培装置。【選択図】図1