An injection apparatus comprising a console having a touch screen display and a storage part, for injecting a contrast medium in a syringe into a patient and an injector head of a dual type, which performs injection of the contrast medium and injection of saline, the injection apparatus configured to perform the following procedures: (a) displaying icons of imaging-regions on the display; (b) when one icon of the imaging-regions is selected, reading an injection time from storage part associated with the imaging-region; (c) determining a contrast medium volume to be injected into a patient; (d) determining an injection rate of the contrast medium based on the determined contrast medium volume and the injection time; (e) displaying a thumbnail image on the display, the thumbnail image including a graph of an injection condition showing a relationship between the injection time and the injection rate; where the graph of the thumbnail image has a horizontal axis representing an elapsed time and a vertical axis representing the injection rate, and wherein a condition image is displayed at a vertical position corresponding to the injection rate and has a horizontal width corresponding to the injection time; (f) when a certain icon on the display and/or a certain hard button on the injector head is pressed, starting a mode for an injection in accordance with the injection condition; characterized in that when the thumbnail image is touched, the thumbnail image is enlarged and another image is shown, which is larger than the thumbnail image and includes the first condition image of contrast medium, a second condition image of saline, and a syringe pressure limit image, said first condition image configured to be selectable so that a user can adjust the injection rate by moving said first condition image upward or downward; (g) receiving input data, the data relating to at least an iodine concentration in the contrast medium; (h) receiving an input relating to the patient's weight, and, in the procedure (c), the volume of the contrast medium is calculated on the basis of: the data of the input patient's weight, the data of the iodine concentration, and data of an iodine amount required per unit weight in association with the selected imaging-region. (a) displaying icons of imaging-regions on the display; (b) when one icon of the imaging-regions is selected, reading an injection time from storage part associated with the imaging-region; (c) determining a contrast medium volume to be injected into a patient; (d) determining an injection rate of the contrast medium based on the determined contrast medium volume and the injection time; (e) displaying a thumbnail image on the display, the thumbnail image including a graph of an injection condition showing a relationship between the injection time and the injection rate; where the graph of the thumbnail image has a horizontal axis representing an elapsed time and a vertical axis representing the injection rate, and wherein a condition image is displayed at a vertical position corresponding to the injection rate and has a horizontal width corresponding to the injection time; (f) when a certain icon on the display and/or a certain hard button on the injector head is pressed, starting a mode for an injection in accordance with the injection condition; characterized in that when the thumbnail image is touched, the thumbnail image is enlarged and another image is shown, which is larger than the thumbnail image and includes the first condition image of contrast medium, a second condition image of saline, and a syringe pressure limit image, said first condition image configured to be selectable so that a user can adjust the injection rate by moving said first condition image upward or downward; (g) receiving input data, the data relating to at least an iodine concentration in the contrast medium; (h) receiving an input relating to the patient's weight, and, in the procedure (c), the volume of the contrast medium is calculated on the basis of: the data of the input patient's weight, the data of the iodine concentration, and data of an iodine amount required per unit weight in association with the selected imaging-region.