PROBLEM TO BE SOLVED: To perform spraying based on a spray plan easily.SOLUTION: A spray support system of a work machine includes: a support device including a plan creation part for creating a spray plan indicating relations between farm field information on a farm field, which is an object for spraying a material to be spayed, and spray information including a spray amount of the material to be sprayed; a plan acquisition device provided to the work machine having a spray device for spraying the material to be sprayed for acquiring the spray plan created by the plan creation part; and a spray control device for controlling a spray part of the spray device on the basis of the spray information of the spray plan acquired by the plan acquisition device.SELECTED DRAWING: Figure 8COPYRIGHT: (C)2020,JPO&INPIT【課題】散布計画に基づいた散布を簡単に行うことができるようにする。【解決手段】作業機の散布支援システムは、散布物を散布する対象である圃場に関する圃場情報と、散布物の散布量を含む散布情報との関係が示された散布計画を作成する計画作成部を含む支援装置と、散布物を散布する散布装置を有する作業機に設けられ、且つ、計画作成部で作成された散布計画を取得する計画取得装置と、計画取得装置が取得した散布計画の散布情報に基づいて、散布装置の散布部を制御する散布制御装置と、を備えている。【選択図】図8