Electronic component package, oscillator, electronic apparatus, and vehicle

An electronic component package including a mounting surface on which a first external terminal is provided, the electronic component package comprising:

• a first substrate including a front surface and a side surface, the side surface including a first side surface, a second side surface crossing the first side surface, a third side surface opposed to the first side surface, a fourth side surface opposed to the second side surface, and a first recess connecting the first side surface with the second side surface;
• a first side surface terminal provided on the first side surface;
• a first recess electrode provided in the first recess and electrically connected with the first external terminal;
• and
• a first branch wiring provided on the front surface and including a first end exposed in the first side surface between the first side surface terminal and the first recess electrode, wherein
• in a plan view of the front surface, the relation:
• L11>L12 is satisfied, where L11 is the distance between the first end and the first recess electrode and L12 is the distance between the first end and the first side surface terminal, and
• the first branch wiring is electrically connected with the first side surface terminal.