from tkinter import * root = Tk() root.title("Aimtocode") scrollbar = Scrollbar(root) #scrollbar.pack(side=RIGHT, fill=Y) # Now it's active, but not visible listbox = Listbox(root) listbox.pack() for i in range(100): listbox.insert(END, i) # attach listbox to scrollbar listbox.config(yscrollcommand=scrollbar.set) listbox2 = Listbox(root) listbox2.pack(side="right") for i in range(100): listbox2.insert(END, i+100) listbox2.config(yscrollcommand=scrollbar.set) scrollbar.config(command=listbox.yview) root.mainloop()