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We performed linear and non-linear resistivity measurements for fine YBa2Cu3O7−δ ceramics under magnetic field. Successive superconducting transition was observed in the linear resistivity and the lower temperature part of the resistivity curve became convex upward at high fields. A non-linear resistivity peak was observed for this lower temperature region and its offset temperature Toffset and the onset temperature Tonest coincided with the temperature of zero resistivity and inflexion point in linear resistivity, respectively. At lower field, Tonset was less sensitive to the field than Toffset, which implies the existence of the peculiar inter-grain ordering phase at finite fields., 2019 International Conference on Strongly Correlated Electron Systems (SCES2019), September 23-28, 2019, Okayama Convention Center in Okayama, Japan