The Hanaore fault is one of the major active faults in the northern Kinki district, southwestern Japan, extending NNE-SSW for about 50km truncating Palaeo-Mesozoic sedimentary rock area. This fault is characterized by tectonic landforms as a right lateral strike-slip fault with uplift on the west side in the northern part and on the east side in the southern part. Sense of the vertical displacement is consistent with that resulted from right lateral movement. Among the tectonic landforms along the fault, stream offset is well preserved. In this paper, the author details amounts of stream offset in order to estimate a slip rate of this fault. Regional disparity in preservation of stream offsets caused by erosion is also discussed.<br> The stream offsets are well preserved on northern Tochudani-Ichiba segment (Figs. 3, 4) and southern Tochu-Ohara segment (Fig. 8). Systematic dextral offsets of streams are observed on these segments and the maxim+um offset amount 440_??_530 m where the upstream length of the offset stream from the fault is 890m in the former segment, and 100_??_420m where 120m in the latter segment. An fault found in an outcrop of late Quaternary deposits near Bomura (Fig. 5) strikes approximately N-S and dips vertically, suggesting the recent of dextral displacement along this fault. Fresh fault scarplets of 2_??_5m in height on younger river terraces near Qhara and Shugakuin (Figs. 8, 9) around the southern end of the fault, also indicate its late Quaternary displacement.<br> The last event of this fault suggested by radiocarbon date of faulted peat layer occurred after 2, 500 y. B. P. (Ishida, 1967). The shear zone along the fault is much wider than that deduced from its Quaternary displacement, which shows its older activity before Quaternary.<br> Relation D=aL is generally recognized on active strike-slip fault (Matsuda, 1966), where D is amount of stream offset, L is length of the stream from the fault trace to the valleyhead, and a is a certain coefficient. If the value obtained from the Hanaore fault could be applied to the empirical relation of Matsuda (1975a), the mean slip rate of this fault ranges 1_??_10m/10³ yr. This mean slip rate is one order larger than the vertical slip rate estimated by the Reserch Group for Active Fault (1980).<br> In case of the Hana ore fault, relation D=aL is satisfied well between Tochudani-Ichiba. The correlation between D and L is obscure in Tochu-Ohara segment (Fig. 10). In this segment, relation D=aL holds good in cases that L is shorter than 150m. However, in cases where L is longer than 150m, D does not increase in accordance with L. This difference should depend on the preservation of stream offsets. The Takano river flowing along the fault trace in Tochu-Rhara segment caused much stronger erosion than that in Tochudani-Ichiba segment, resulting in poor preservation of stream offset.