Yes, an ergonomic chair is good for back pain because pressure on your lower back is reduced while also supporting your spine. It helps to correct poor posture habits of yours. Chronic unease often happens then.
If you ever feel sore after you sit for long hours, it is probable that your chair isn’t supporting your back in the way that it needs. Ergonomic chairs address this issue in a specific way. They encourage proper posture, offer steady lumbar support, and lessen tension igniting initial back discomfort.
Lower back support is key to relieving discomfort

An ergonomic chair helps reduce back pain through support of the lumbar spine, since it is the area that is most affected by sitting. This support gives aid for the spine. The natural curve is in that way maintained.
Your lower back tends to round or collapse if you sit too long. This pressures upon the spinal discs as well as muscles. This results in the tightness or even long-term pain. For spine health, an ergonomic chair uses even a contoured backrest for supporting of your lumbar region in a healthy “S” shape.
This support reduces tension gradually, helps muscles relax, and lets your back recover from strain from bad posture. Even though you might need to move and stretch throughout the day, the chair can protect your lower back in a major way while you sit.
It prevents the bad habits that cause back pain in the first place

Ergonomic chairs reduce the need to slouch, lean forward, or twist your spine unnaturally. This makes it easier to maintain a healthy sitting position without thinking about it.
Most back pain linked to sitting comes from habits you barely notice like leaning on one armrest, sliding forward in your seat, or hunching over your desk. These small movements add up. Over time, they put uneven pressure on your spine and leave muscles sore or imbalanced.
An ergonomic chair discourages these habits by aligning your hips, spine, and shoulders from the moment you sit down. The backrest gives your spine consistent support, and the seat encourages your feet to stay flat on the floor. With this structure, your body naturally stays in a better position, which reduces the risk of back pain over the long term.
So, if you’re dealing with back pain, or want to prevent it from starting, an ergonomic chair is one of the best adjustments you can make.