A battery remaining capacity detecting apparatus includes a remaining capacity calculating section, first and second target remaining capacity calculating sections and a remaining capacity revising section. The first and second target remaining capacity calculating sections are configured to calculate first and second target remaining capacities using first and second calculation processes when first and second prescribed battery related conditions are satisfied, respectively. The second calculating process has a lower accuracy than the first calculation process, and the second prescribed battery related condition is satisfied with a higher frequency than the first prescribed battery related condition. The remaining capacity revising section is configured to revise the remaining capacity toward the first and second target remaining capacities using revision amounts equal to or smaller than first and second revision amount upper limit values, respectively with the second revision amount upper limit value being smaller than the first revision amount upper limit value.