Open-type wharves on vertical piles may be effective to prevent and reduce the damage slight due to earthquake and tsunami. Characteristics of tsunami-induced pressures and forces acting on the deck block and cylindrical piles is not confirmed enough, so in this research, physical model tests were conducted in a wave flume to investigate the tsunami-induced forces on the model using by solitary waves. As a result of the tests, the wave pressure of the deck block surface fell significantly compared with the hydrostatic pressure, and it was confirmed that the wave pressure difference in the faces at the top and the bottom of the deck block brings lift and that the vertical force excels to the horizontal force of the wharves. These tendency were similar to the steady flow test results already reported. The wave pressures and forces acting on the wharves were different depending on presences of connection plates. We also found to occur during the first solitary waves crash impact pressure, it causes the maximum wave force. It was revealed that the non-dimensional wave pressure variation at the maximum water level on the solitary wave is smaller than that at the maximum vertical force occurs. The variation of wave pressure and lift coefficient at the maximum water level on the solitary wave may be larger compared with that of steady flow test.