A display device which is used for operation of an injection molding machine which injects a molding material into a mold unit, the display device comprising: a display unit configured to display a plurality of operation objects representing operations to be performed in a molding process of the injection molding machine; an input unit to which selection and disposition of the operation object are input by an operator in order to construct an array of the operation objects for causing the injection molding machine to perform a series of operations; and a control unit configured to provide the operator with suggestions to assist in construction of the array of the operation objects, based on at least one information of information on a relationship with an already disposed operation object and information on the mold unit, the information on the mold unit being set in advance in accordance with the mold unit and being stored in a storage unit, wherein the display unit is configured to display a setting screen which includes a selection area (Ac) in which a plurality of selectable operation objects are displayed, and an array area (As) in which a plurality of disposition spaces in which the operation object selected from the selection area (Ac) by the operator can be disposed are arranged in order of a flow of the molding process, wherein at least one of the suggestions is a visually recognizable suggestion which is displayed on the display unit, and wherein when the operator selects the disposition space in which the operation object is not disposed, among the disposition spaces of the array area (As), as the visually recognizable suggestion, the control unit is configured to cause one or a plurality of prediction operation objects capable of being disposed in the disposition spaces to be displayed based on the information. a display unit configured to display a plurality of operation objects representing operations to be performed in a molding process of the injection molding machine; an input unit to which selection and disposition of the operation object are input by an operator in order to construct an array of the operation objects for causing the injection molding machine to perform a series of operations; and a control unit configured to provide the operator with suggestions to assist in construction of the array of the operation objects, based on at least one information of information on a relationship with an already disposed operation object and information on the mold unit, the information on the mold unit being set in advance in accordance with the mold unit and being stored in a storage unit, wherein the display unit is configured to display a setting screen which includes a selection area (Ac) in which a plurality of selectable operation objects are displayed, and an array area (As) in which a plurality of disposition spaces in which the operation object selected from the selection area (Ac) by the operator can be disposed are arranged in order of a flow of the molding process, a selection area (Ac) in which a plurality of selectable operation objects are displayed, and an array area (As) in which a plurality of disposition spaces in which the operation object selected from the selection area (Ac) by the operator can be disposed are arranged in order of a flow of the molding process, wherein at least one of the suggestions is a visually recognizable suggestion which is displayed on the display unit, and wherein when the operator selects the disposition space in which the operation object is not disposed, among the disposition spaces of the array area (As), as the visually recognizable suggestion, the control unit is configured to cause one or a plurality of prediction operation objects capable of being disposed in the disposition spaces to be displayed based on the information.