To investigate characteristics of resistance for rice-ear bugs of the rice variety “Milyang 44”, we studied from two points of view. Firstly, characteristics of resistance were investigated in relation to the ripening stage of paddy rice and non-preference of rice-ear bugs. Secondly, the effect of resistance was verified in paddy-field-cultivated “Milyang 44” and comparative varieties under the condition that rice-ear bugs occur spontaneously. For the first investigation, we released rice-ear bugs of two species with different feeding characteristics, Leptocorisa chinesis (feeds on paddy rice along the hooking portion of the grain, prefers milk-ripe stage) and Cletus punctiger (feeds on paddy rice grains everywhere, feeds over a wide period of ripening but mainly in the dough-ripe stage), onto “Milyang 44” and comparative varieties at the stage of maturation 10 or 20 days after heading (DAH) in mosquito nets. Additionally, we measured the hardness of paddy rice with a rheometer as an index of the ripening stage of paddy rice. As a result, in the case of offering plants at the stage of maturation 20 DAH, “Milyang 44” stably showed resistance to the two species of rice-ear bug with different feeding characteristics. But in the case of offering plants at the stage of maturation 10 DAH, “Milyang 44” showed different resistance between each year for L. chinesis, and no resistance for C. punctiger. In addition, the relationship between the hardness of paddy rice and the rate of picky rice showed a negative correlation for these two species. Moreover, in its correlation of L. chinesis, “Milyang 44” showed a lower rate of picky rice than a comparative variety as the paddy rice becomes hard. As such, it was considered that resistance intensifies with the maturation of paddy rice. However, in the previously mentioned correlation of C. punctiger, “Milyang 44” showed a lower rate of picky rice in any hardness of paddy rice than a comparative variety. The number of infected C. punctiger did not show a significant difference to a comparative variety. On the other hand, the number of infected L. chinesis at “Milyang 44” was fewer than a comparative variety. Therefore, it was considered that L. chinesis shows a non-preference to “Milyang 44” and it contributes to the resistance of “Milyang 44” for L. chinesis. As such, it suggests that the difference between the previously mentioned correlation in these two species was influenced by the difference of preference to “Milyang 44” and the ripening stage of paddy rice selectively damaged by these two species. The result of a second investigation, the effect of resistance of “Milyang 44” was verified in the paddy field under the condition that rice-ear bugs occurred spontaneously throughout three years.