Biological information detection device

A biological information detection device, comprising:

• a housing having a planar housing surface and configured to come into contact with a subject when biological information of the subject is measured;
• a detection unit disposed in the housing and having a light receiving portion configured to receive light from the subject;
• a light-transmissive member disposed at a side of the housing surface of the housing, and having a planar portion configured to transmit the light from the subject and configured to come into contact with the subject when the biological information of the subject is measured;
• and
• a pressing force suppression unit disposed on the housing surface to surround the planar portion as seen from a Z-axis direction, when two axes parallel to the housing surface and orthogonal to each other are an X-axis and a Y-axis, and an axis orthogonal to the X-axis and the Y-axis is the Z-axis, configured to come into contact with the subject when the biological information is measured, and configured to suppress a pressing force applied to the subject by the planar portion, wherein
• the pressing force suppression unit is formed using a material harder than the subject,
• a height of a side of the pressing force suppression unit that comes into contact with the subject from the housing surface in the Z-axis direction is higher than a height of the planar portion with reference to the housing surface, and
• the pressing force suppression unit has a first inclined section in which the height of the pressing force suppression unit increases continuously or in a stepwise manner from an inner periphery side toward an outer periphery side of the pressing force suppression unit.