PROBLEM TO BE SOLVED: To provide an eye drop with dispersion of the dropped amount being suppressed even when the amount of a drop for an eye drop containing a thickener or a terpenoid compound is less.SOLUTION: The eye drop of the present invention contains (A) a thickener or terpenoid compound and (B) a boric acid buffer, where the amount per drop is 5 to 25 μL. The suppression method of dispersion of a drop of the eye drop of the present invention is designed such that the eye drop contains (A) a thickener or terpenoid compound and (B) a boric acid buffer and that the amount per drop of the eye drop is 5 to 25 μL.