A inputting device including a position detection device and an electronic pen, wherein the position detection device having an accommodation portion that accommodates therein the electronic pen having a position indication coil wound in an axial direction of the electronic pen, the device comprising: a planar coil disposed adjacent to the accommodation portion at a position at which a center axis direction of the planar coil crosses the axial direction of the electronic pen , and a first number of first magnetic fluxes (Mfa), from among magnetic fluxes generated by the planar coil , interlinking in a first direction with the position indication coil of the electronic pen is not equal to a second number of second magnetic fluxes (Mfb), from among the magnetic fluxes generated by the planar coil , interlinking in a second direction with the position indication coil of the electronic pen, the first direction being opposite the second direction, such that the planar coil is disposed such that the first magnetic fluxes (Mfa) interlink more with the coil of the electronic pen than the second magnetic fluxes (Mfb), while the electronic pen is accommodated in the accommodation portion ; a first control circuit which, in operation, performs control such that a supply process in which a first signal is supplied to the planar coil and a reception process in which a second signal is received through the planar coil by electromagnetic induction are performed alternately; and a first detection circuit which, in operation, detects a state regarding accommodation of the electronic pen in the accommodation portion in accordance with a presence or an absence of the second signal from the coil of the electronic pen received through the planar coil . a planar coil disposed adjacent to the accommodation portion at a position at which a center axis direction of the planar coil crosses the axial direction of the electronic pen , and a first number of first magnetic fluxes (Mfa), from among magnetic fluxes generated by the planar coil , interlinking in a first direction with the position indication coil of the electronic pen is not equal to a second number of second magnetic fluxes (Mfb), from among the magnetic fluxes generated by the planar coil , interlinking in a second direction with the position indication coil of the electronic pen, the first direction being opposite the second direction, such that the planar coil is disposed such that the first magnetic fluxes (Mfa) interlink more with the coil of the electronic pen than the second magnetic fluxes (Mfb), while the electronic pen is accommodated in the accommodation portion ; a first control circuit which, in operation, performs control such that a supply process in which a first signal is supplied to the planar coil and a reception process in which a second signal is received through the planar coil by electromagnetic induction are performed alternately; and a first detection circuit which, in operation, detects a state regarding accommodation of the electronic pen in the accommodation portion in accordance with a presence or an absence of the second signal from the coil of the electronic pen received through the planar coil . <EOS>