A sample processing apparatus, comprising: a first sample processing unit configured to process a sample; a second sample processing unit configured to process a sample; and a data processing unit connected to the first and the second sample processing units (51, 52) so as to control the first sample processing unit and the second sample processing unit, wherein the data processing unit includes: a display device; an input device; and a controller configured to show a screen on the display device, wherein the screen comprises a shared region which is shared for displaying information of each of the first and the second sample processing units (51, 52), a first operation section operable through the input device by a user to control the first sample processing unit and a second operation section operable through the input device by the user to control the second sample processing unit, and control the first sample processing unit in response to an operation of the first operation section by the user, and control the second sample processing unit in response to an operation of the second operation section by the user, wherein the controller is configured to display, in the first operation section, first objects operable by the user and display, in the second operation section, second objects operable by the user, and display a first operation screen operable by the user to control the first sample processing unit in response to an operation of one of the first objects and display a second operation screen operable by the user to control the second sample processing unit in response to an operation of one of the second objects, wherein the controller is configured to display the first operation screen, in the shared region, at a position adjacent to the first objects, and display the second operation screen, in the shared region, at a position adjacent to the second objects. a first sample processing unit configured to process a sample; a second sample processing unit configured to process a sample; and a data processing unit connected to the first and the second sample processing units (51, 52) so as to control the first sample processing unit and the second sample processing unit, wherein the data processing unit includes: a display device; an input device; and a controller configured to show a screen on the display device, wherein the screen comprises a shared region which is shared for displaying information of each of the first and the second sample processing units (51, 52), a first operation section operable through the input device by a user to control the first sample processing unit and a second operation section operable through the input device by the user to control the second sample processing unit, and control the first sample processing unit in response to an operation of the first operation section by the user, and control the second sample processing unit in response to an operation of the second operation section by the user, wherein the controller is configured to display, in the first operation section, first objects operable by the user and display, in the second operation section, second objects operable by the user, and display a first operation screen operable by the user to control the first sample processing unit in response to an operation of one of the first objects and display a second operation screen operable by the user to control the second sample processing unit in response to an operation of one of the second objects, wherein the controller is configured to display the first operation screen, in the shared region, at a position adjacent to the first objects, and display the second operation screen, in the shared region, at a position adjacent to the second objects. a display device; an input device; and a controller configured to show a screen on the display device, wherein the screen comprises a shared region which is shared for displaying information of each of the first and the second sample processing units (51, 52), a first operation section operable through the input device by a user to control the first sample processing unit and a second operation section operable through the input device by the user to control the second sample processing unit, and control the first sample processing unit in response to an operation of the first operation section by the user, and control the second sample processing unit in response to an operation of the second operation section by the user, wherein the controller is configured to display, in the first operation section, first objects operable by the user and display, in the second operation section, second objects operable by the user, and display a first operation screen operable by the user to control the first sample processing unit in response to an operation of one of the first objects and display a second operation screen operable by the user to control the second sample processing unit in response to an operation of one of the second objects, wherein the controller is configured to display the first operation screen, in the shared region, at a position adjacent to the first objects, and display the second operation screen, in the shared region, at a position adjacent to the second objects.