Abstract: A cap with sleep posture alarm comprising a cap adapted for receiving a user's head; alarm circuitry for generating an alarm signal when electrically energized; at least one speaker for transmitting an alarm based upon receipt of an alarm signal; a power source for providing electrical energy to the alarm circuitry; a first switch having an enabled orientation for energizing the alarm circuitry and a disabled orientation for de-energizing the alarm circuitry; and a second switch coupled to the cap and having a biased orientation when tilted forwards and backwards for allowing an alarm signal to be transmitted to the speaker and an unbiased-orientation for preventing such transmission; whereby when the first switch is enabled, and when the second switch is placed in an engaged orientation such as when a user's head falls forwards or backwards when nodding out in sleep, an alarm is transmitted.