WA women can now book mammograms with BreastScreen WA online.
Health Minister Kim Hames said it was expected that 5000 more women would be screened each year due to the ease of access to online appointments.
Online bookings will not be available for rural users.
"Up until now, if a woman wanted to book her regular screening mammogram she would need to call for an appointment during business hours from Monday to Friday," Dr Hames said.
"Considering how busy many women's lives are, it's very easy for this important health check to fall off the to-do list during the working day.
"With the convenience of being able to book an appointment 24-hours-a-day, seven-days-a-week we expect a significant number of extra women will be able to access the BreastScreen WA service each year."
Breast cancer is the most common potentially fatal cancer in Australian women, with one in eight developing the disease during her lifetime.
BreastScreen provides free breast screening to WA women aged 40 years and over, but specifically targets women aged 50-69 years who are invited to have a mammogram appointment every two years.