Particulate matter detection element and particulate matter detection sensor

A particulate matter detection element including a laminated part in which paired detection electrodes for detecting particulate matter contained in exhaust gas discharged from an internal combustion engine and insulating members made of electrically insulating material are laminated alternately, the particulate matter detection element comprising:

• a deposition part in which at least part of the paired detection electrodes is exposed from the insulating members, in a direction perpendicular to a lamination direction of the paired detection electrodes and the insulating members, a part of the particulate matter being caused to deposit on the deposition part, wherein
• a surface roughness of at least the insulating member disposed between the paired detection electrodes in the deposition part is between 0.8 μm and 8.0 μm in 10-point average roughness.