Thermosensitive recording medium

A thermosensitive recording medium comprising:

• an undercoat layer provided on a substrate;
• and
• a thermosensitive recording layer containing a colorless or pale colored electron donating leuco dye and an electron accepting color developing agent provided on the undercoat layer,
• wherein the thermosensitive recording layer contains as the electron accepting color developing agent a urea compound,
• wherein the undercoat layer contains 50 to 95 weight % of a pigment by solid and 50 weight % or more of plastic hollow particles by solid with respect to the pigment, and
• wherein the urea compound is selected from the group consisting of the following (1) to (3)
• (1) a first urea compound represented by the following general formula (Formula 6)
• wherein R9 may be identical or different from each other and represent an alkyl group having 1 to 4 carbon atoms, and o represents an integer of 0 to 1, and the position of R9 in the benzene ring is the 4-position,
• (2) a second urea compound represented by the following general formula (Formula 8), and
• (3) a third urea compound represented as N-[2-(3-phenylureido) phenyl] benzenesulfonamide.