A device for measuring particulate matter, comprising: a first filter that is provided in an exhaust passage of an internal combustion engine and that includes a plurality of quadrilateral cells (1, 2, 3, 4) forming lattice-patterned exhaust flow channels defined by porous partition walls, the plurality of cells (1, 2, 3, 4) being plugged alternatingly at an upstream side and a downstream side; four electrodes (A, B); a first conducting connecting member; a second conducting connecting member; and accumulation amount calculating means (21, 22) configured to calculate an amount of accumulated particulate matter collected by the filter, the device being characterized in that the four electrodes (A, B) comprise a first pair of electrodes received in a first pair of diagonal cells out of said plurality of cells, said first pair of diagonal cells disposed diagonally across at least one cell out of said plurality of cells, said at least one cell designated as a center cell, said first pair of electrodes being received from unplugged sides of said first pair of diagonal cells; a second pair of electrodes received in a second pair of diagonal cells out of said plurality of cells, said second pair of diagonal cells disposed diagonally across the center cell, said second pair of electrodes being received from unplugged sides of said second pair of diagonal cells, the electrodes of the first pair of electrodes not being received in the diagonal cells of the second pair; the device further being characterized in that the first conducting connecting member connects the electrodes of the first pair of electrodes to each other; the second conducting connecting member connects the electrodes of the second pair of electrodes to each other; whereby four cells out of said plurality of cells, which are disposed adjacent to each other around the partition walls of the center cell and sandwiched between the diagonal cells (2, 3) of the first and second pairs, are being used as measurement cells, and whereby the amount of accumulated particulate matter collected by the filter is calculated based on an electrostatic capacity between the first and second pairs of electrodes (A, B). a first filter that is provided in an exhaust passage of an internal combustion engine and that includes a plurality of quadrilateral cells (1, 2, 3, 4) forming lattice-patterned exhaust flow channels defined by porous partition walls, the plurality of cells (1, 2, 3, 4) being plugged alternatingly at an upstream side and a downstream side; four electrodes (A, B); a first conducting connecting member; a second conducting connecting member; and accumulation amount calculating means (21, 22) configured to calculate an amount of accumulated particulate matter collected by the filter, the device being characterized in that the four electrodes (A, B) comprise a first pair of electrodes received in a first pair of diagonal cells out of said plurality of cells, said first pair of diagonal cells disposed diagonally across at least one cell out of said plurality of cells, said at least one cell designated as a center cell, said first pair of electrodes being received from unplugged sides of said first pair of diagonal cells; a second pair of electrodes received in a second pair of diagonal cells out of said plurality of cells, said second pair of diagonal cells disposed diagonally across the center cell, said second pair of electrodes being received from unplugged sides of said second pair of diagonal cells, the electrodes of the first pair of electrodes not being received in the diagonal cells of the second pair; the device further being characterized in that the first conducting connecting member connects the electrodes of the first pair of electrodes to each other; the second conducting connecting member connects the electrodes of the second pair of electrodes to each other; whereby four cells out of said plurality of cells, which are disposed adjacent to each other around the partition walls of the center cell and sandwiched between the diagonal cells (2, 3) of the first and second pairs, are being used as measurement cells, and whereby the amount of accumulated particulate matter collected by the filter is calculated based on an electrostatic capacity between the first and second pairs of electrodes (A, B).